Ok I took the exhaust off an the car runs perfect. But now the mechanical fuel pump just craped out on me LOL. it never ends. all well atleast the fuel pump is only 26 dollars. an I have a carb coming so Its almost there.
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Ok I took the exhaust off an the car runs perfect. But now the mechanical fuel pump just craped out on me LOL. it never ends. all well atleast the fuel pump is only 26 dollars. an I have a carb coming so Its almost there.
Dont give up, bro. Sounds like you're closing in on it.
I was wondering the same thing Pat. You better check that oil hate hearing those big booms! that come with a gas filled crank case. When you had the other carb on your motor was your exhaust hooked up?
I've had motors that had lots of compression that could not breath because the the exhaust manifolds would not flow enough. The car ran fine with them off but when I put them on the car ran like crap, so I had to go with headers and some good high flow mufflers.
Kurt
Just a thought... Mechanical fuel pump, gas line routing, exhaust heat boiling the fuel in the lines and fuel is percolating down in to the intake after you shut it off?
SO yea there is def gas in the oil. so I have to change that before I wipe out a bearing or what not. Would that have been caused buy the pump craping out or buy the exhaust being too restrictive?
:mad:well very depressing news. the carb arived in the mail an the guy I bought it from mis printed the carbs ID number in the craig lists ad an it turns out to be the 650 spreadbore holley single feed double pump. I dont know if it will work. the one thats on the car is the 800 spreadbore holley. I will rebuild it this week an change the fuel pump as well an try it but the 760 didnt work the 800 works great I cant imagine the 650 working as good as the 800. Anyone on here run there 454 with a 650 quadrajet? i mean the 454 came stock with a 850 quadrajet or rockchester if im not mistaken. alwell at least i paid little to nothing for it. but im not happy:CRY:
Im also a v8 fiero guy, but not to the extreme as the 454. im running a sbc. And i had same issue as you. What i suggest to you, get rid of mechanical fuel pump, run a in tank pump, reroute the lines to the side, slap a fuel cooler on the side with a small fan, route that to your carb, use a RPM airgap intake or some sort of highrise intake With a good 1-2 inch spacer on your carb. I know its alot of work, but on these small cars not much room to work, you need that cold gas. Hope your luck gets better.
Prox.
Not mine but I thought it would be something to look at. Its on ebay for sale right now. A very well built Fiero drag car front engine. ran a 9.51 @ 143 at Mile High Dragway.
http://www.axehaven.com/cars/FieroCollage.jpg
http://www.axehaven.com/cars/details.jpg
thats insane!
wow it's official there is one more fiero crazed maniac out there other than my buddy that looks awesome cant believe that motor was crammed in there holy @#@@$# as my buddy states looking at these pics hahaha now he's running out looking to do the same thing lord help us lol....hope you get her purring than growling right let us know
ok so I fabed up some exhaust out of two glass packs. the car ran great off the headers no smoke I get the exhaust on an it starts running like crap. I think the carb is just too big still no matter how lean it is its still rich with a 61 primary an a 83 secondary . at full throttle the thing comes right to life. but if you hold the throttle at like 2500 RPM it just spits sputters an miss fires. so Im going to try the 650 spread bore holley that i have. Im hoping smaller carb = less fuel = runns better. with the headers off It was decent on gas. the second I put the exhaust pipes on it started swallowing gas. like crazy just ideling 2 gallons in 10 minutes. all well same story difrent day I try the new carb tomorrow.
almost sounds like something is restricting the exhaust flow, how small are your headers? how big is your collector how big is your exhaust.
Its 2 1/2 inch all around. The headers are standard size an made for a big block. the heads are just the peanut port heads from a pick up truck. but its 2 1/2 inches. there is maybe at the most only 2 feet of exhaust after the header. the pipe off the header on both sides do pull a 90 degree bend but other then that its all wide open. I think the glass pack reduced to 2 inches. but that is plenty of flow now. no more 2 in to one kinda thing. this should be breathing great. I just rebuilt my holley 650 spreadbore. an I have a almost new quadrajet so im gonna try these cause the exhaust was super rich with the 850 with the exhaust on it. so I think a smaller carb will work. an a couple of people have told me that the 650 quadrajet is a perfect carb for a big block too so im about to find out if you know what i mean LOL. I will find out this weekend.
Can you try your buddies carb on it again and see if it runs right now.
Sounds like you still have carb issues to me. But if it does not run
right with it on there something else is wrong.
But I think you'll find it runs good again and your problem is with the carb.
Kurt
yea I still have my buddies carb. that was the carb i was using when I put the glass packs on. I said its running great with this carb lets get some glass packs on it to see how noisie its going to be an what not. the second i put the pipes on an there pretty much just straight pipes not much has changed in restriction it started running crappy. it idols alright an when its right to the floor it just insane but at a steady RPM it spits an sputters an what not. an now with the exhaust on it its running really rich again it makes no sences cause there really is no restriction in the exhaust its like literaly 2 feet. Its just a set of glass packs right off the headers. each on of the headers has a glass pack an that is it. its wide open.
I'm probably like half the other guys on here and wish I was not so far away so I could come over and look at it for my self. It's hard to tell what is going on with out being there to look at it for your self. Though there are many more guys on here that could help or tell alot better what the problem is. But it does have me curios now anyway.
And I sure would like to see that thing tearing up the asphalt.
Kurt
what kind of headers fit around the transaxle?
I have the same setup but don't see nearly
enough room for anything but 1 pipe on the right side
especially?
i do not see how you are geting any air to feed any size carb .i bet its a big dead spot back there were there is no air to feed a bbc ??????????
actually the fiero aerodymanics have a huge amount of air swirling around back there, hence the cooling vents they put there. i own a fiero, granted its a 4 cyl, but i did some research on the car and the air flow goes right over the top and vacuums back into the back window pane. unique little car, just couldnt imagine how fast it is with a 400 hp engine in the back. my little 103 hp 4 cylinder gets it moving quite nicely.
yep you could be right or not? there is a time were he needs to check every thing .that car now has a air cleaner sicking out of the stock lid .its EZ to check tape some fuzzy yarn a 1 inch long in line on that part of the lid and drive down the road have someone look at them and see how the air is working them .if swirling around it could be low pressure zone in back of that widow and will screw with the air vents ect on the carb .just thinking out loud. i could be just all wet .i did work on fiero many years ago with a 355 in it when it did run right it was fun. but it was hit and miss .it came down to i think to big of a carb .to much fuel psi . and air getting in the engine.it could of needed smaller cam or more stall .i am not sure if the guy was ever happy with the way it worked he was not willing to try new thing s to make it run better some of the stuff did help smaller carb less fuel psi but still was hit and miss sometimes it did run good but never ran great all the time . i did get worn out on working on his car for free
I have just been brozing thru this post---several basics have been totally misapplied or totally ignored---
In no particular order I have read about a fuel pump malfunction/failure, exhaust headers hooked up where one side blows right into other side, air cleaner base appears to be offset severely, air cleaner mounted thru lid into low pressure area, jet sizes completely out of wack, fuel in oil-----
There needs to be a structured road to resolving these issues not just e bay or craigs list swapping of carbs, etc
First the exhaust has to be separated
Fuel supply/pressure verified to have adquate flow with only around 4 pounds of pressure
Oil changed
Jet size at what Holley put in carbs
3.5 or 4.5 power valve
lock out timing by safty wiring advance mech inside dist,disconnect vacume
set timing to 20-34 degrees
prime carb
no aircleaner
start car
smile
drive car to reasonable speed
put aircleaner on--drive car to reasonable speed
There is a lowpressure/vacume area behind the back glass THAT will effect carb--it will cause the power valve to open and feed too much fuel and the carb will be very erratic acting differently at different vehicle speeds
Put some bright colored yarn around the different areas of the car and video at moderate speeds( It might take 80mph to get a good representation of where the air wants to go)
If you want I will come to Me. and work on it for 2 hours for $1000 plus travel expenses
Pat---just so there is no mis understanding---that was 2 hours for $1000, not $1000 per hour----but I do want lobster for lunch
This ordeal has been on here for 6 months of carb switching
Can we watch you work for free or do we have to buy drinks for that!!!
HE! HE! HE!
Kurt
maybe we can do a live telecast over speed or something ( or for the lobster the food channel??
Orange county is going off the air maybe we can work a deal.. JERRY . i am thinking a HOT ROD ENGINE/CAR BUILDING . GHOST/UFO HUNTTING FOOD EATING SHOW .I THINK IT WILL WORK:)
Pat I'd watch your show over orange county choppers any day! First season was cool, when they were new and not so cocky. A friend of mine is related to Vinnie. She said he quit the show because Paul Sr. and Jr. wouldn't give Cody health insurance when he started working for them full time out of high school. These guys were making millions, but to tight to provide for their own, kind of makes you wonder! If you go to wikipedia it say's they quit the show for unknown reasons!
seems like you guys know what you are talking about, you cannot burn the fuel without the right amount of air ,do you remember when the fiero first came out they had an aftermarket body kit that had a snorkel that stood up taller than the roof to feed the engine, i hope with all the rich carb problems have not compromised the rings and bearings , maybe with the scoop it would run right, all i know about fieros is that if the 4 cylinders run out of oil the rods shoot out of the block and the car catches fire, i seen quite a few back in the 90s when a lot of them were sitting on the roadside with just the rear burned?? car building food show, i would watch ,
HeyWE just maybe on someting here car building food show :) with none of that fighting b.s and poor rich kid.. That want s it all his way :)
It kinda fells like I am watching TMZ with all the inside information.
All we need now is some photo's of you guy's eating with one hand and
working on the car with your other hand. HE! HE!
I could of saved my self a lot of writting and just said that new word,
Multi - tasking
Kurt
any one that knows me.... knows i can do that :)
OK Danica AND Jr out of the race---where were we???
Personally I like KFC for muti - tasking.
Lobster is just too slippery with all that butter.
Kurt
But that extra crispy breading is hard on bearings---butter is slippery
HE! HE! HE! well you got me there!!! HE! HE! HE!
I guess that's why you make $1000 every two hours!!!
Kurt
ok To address some of this.
the exhaust has been fixed an two pipes are running in to a set of glass packs there is only about two feet of exhaust. how ever long a set of glass packs are an then about 8inches after that. the headers come off the motor an face forwardin stead of backwards they face the front of the car which is why im running the pipes out the front of the back wheels.
the pump has been replaced by a stock oem pump an it puts out 5 PSI of pressure. the old pump was leaking in to the crank case on to the rod thats how the fuel was getting in the motor. The oil has been changed an it seems to be pretty good since then. I tested the cylinders the other week an the all tested between 175 an 180.
I am goin to change the carb once again. I finally found a quadrajett that has been refurbished an is only 4 years old the guy gave me all the paper work with it he had it on a 400 small block that was used in a plow truck. since it is the stock oem part it should work with out a problem. he said he bought it an put it on an it worked. an it should do the same for me.
I have the timming set off the crank at 8 degress cause thats what I was told was stock. right now I just want the car to run not proform great if you know what i mean. the motor sets to the passanger side about two inches so the exhaust could run out the back of the car thats why the air breather mount plate is off set so it still comes out the center of the hood. the old car was leaking like a bastard from around the gaskests. it had two spacers to get it to hook up to the edelbrock tourquer manifold that I have. I replaced all the spacers with just a square bore to spread bore adaptor. the other plate that was being used waht to level the carb an it was like 4 inches high Dont need it so I dont want it. I thought about just putting a huge ram air right on the trunk an having it come up over the hook but a bunch of people told me that it would do nothing for me but make my car look retarded with a 15 inch shaker on it an I would gain nothing. maybe they were wrong thats why I came to this forum. you all seem to be very well knowlegeable with these things. and I am slowly trying all of your ideas.
I wish I could afford to have you come out an check this out for me but Im laid off right this second thats why this is taking so long to do. but the lobster I could do for you. LOL:) I would love to see if some tv show would be intrested in checking this thing out for me but 1) I dont have the funds to do that2) No one really is intrested in fieros Ive been driving a fiero for years an I get more negative remarks then anything if that was the case a show like pimp my ride or power block or overhaulin or shit pinks would be calling fiero x up an having him race his 3800 turbo charged car that runs a low 10 second quarter an is regarded as the fastest fiero that is road leagal on the road today 4) im no were near a place like california were all those shows take place. Im even surprised I've gotten the help from all of you guys its been huge. most people say thats a waste of a good motor. you guys have been priceless with all the ideas an info. so untill overhauling or powerblock calls me your the next best thing:D
Ok so I've got almost everything sorted out an the car is running pretty good. I am using the holley 600 an the car runs fine at a idle an what not. I have the timming advanced like crazy. 25 degrees or so an it is like crazy off a line. it drives great till bout 50 miles an hour an then it starts back firing while driving at speed. but at slower speeds it has crazy power. theres no pinging or anything but it has alot of popping an what not while driving at normal speed. If you guys have any idea's im all ears
I'm soryy you may have written it some where in here but what kind of ignition are you using and what distributor? It almost sound like problems with a MSD or distributor.
Is there a rev limiter, I had a Tack that had a red line rev limmiter in it and it shorted out and started doing that at about 4,000 RPM's. Also check it real good for some loose wires to the Ignition system. Kurt