Engine to stuborn to turn off

[Kustom56Merc]

Hello, My engine won't shut off after I take the key out. I was wondering if anybody knows the specs on the timing for a 428 FE? Or at least I think it is a 428, the only numbers I can read is the manifold C8VE 9425 B. I think this is a 1968 T-bid engine, by the way did this engine come witht the c4 or c6 tansmision? Does anybody know the factory specs on the power this engine produced? Thanks in advance for the info, and knowledge I well recieve.

Kevin

[HWORRELL]

If ya mean it diesels when ya shut it off its simply idleing to fast, lotsa cars use a kicker solenoid on the carb linkage, you adjust your idle speed with this and when ya turn the key off the solenoid closes thus closing the butterflys completely.

[Ives Bradley]

Them dang ford solenoids will keep the starter engaged if your battery gets too low. My sisters Lincoln 462 did it untill I changed it out.

[Kustom56Merc]

Well I think I should still check the timing on it, but I don't know what are the factory specks on the timing. When I got the car it came with a carter carburetor, do you guys think I still have a solenoid problem?

[ricebasher302]

A vacuum leak can worsen the problem as well.

[Thunderbucket]

Here are the specs for the High compression V8

Thunderbird 428 V-8
Bore & stroke: 4.13" x 3.98"
Comp. ratio: 10.5:1
Horsepower: 345 at 4600 RPM
Maximum Torque 462 at 2800 RPM
Carburetor: Ford 9510 4-barrel
Dual exhaust system with resonators

And Low compression:

engine code:8 428 Cubic Inch V-8
Bore & stroke: 4.00" x 3.30"
Comp. ratio: 8.9:1
Horsepower: 265 at 4400 RPM
Carburetor: Ford 9510 4-barrel

[Thunderbucket]

And the transmission:
TRANSMISSION CODES


CODE/DESCRIPTION


4 C6 Dual Range (Automatic, 3-Speed)
(Installed with all 428 engines/used
exclusively after mid-November
through remainder of production)


8 Cruise-O-Matic (Automatic, 3-Speed)
(Installed with 390 engine/used in early
production only, discontinued in
mid-November

[Dave Severson]

If the car is dieseling after you shut it off, check the idle solenoid on the carb.... Like Hworrell said, this is what causes the butterlies in the carb to close completely.

[truedog]

Originally posted by Kustom56Merc
Well I think I should still check the timing on it, but I don't know what are the factory specks on the timing.

Incorrect timing can't cause an engine to deisel after turning off the ignition.