Thread: newbie needs help with misfire at high rpms

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Is there a way to tighten or stiffen the secondaries

Originally posted by attherain991
Is there a way to tighten or stiffen the secondaries

yes but it hard to explane, if you think they are loose then lock them down or tie them closed, so they cant open and go drive it, wont hurt anything and if it helps then that your problem.

is there a way to tighten or stiffen the secondaries

thanks ill try tomorrow...

oh yeah you said i could put vac advance on a full vaccum to check it ..How and where???

one more thing would loose secondaries cause high gas consuption

Originally posted by attherain991
oh yeah you said i could put vac advance on a full vaccum to check it ..How and where???

with motor running pull vac hose off of the dist and put your finger over it, if you fill a suction its got vac. hook it back up to the vac adv and it should change the rpm. if it dont the adv is bad. if there is no vac there find a small vac port on the base of the carb and put the hose from there to the vac adv., should see some change in the rpm.

Originally posted by attherain991
one more thing would loose secondaries cause high gas consuption

yes

Look for a "Little Old Lady" car at a junkyard with a Q-jet on it. More times than not, those are good carbs. Also, there is a mixture controll module on the later q-jets. If your TPS or O2 sensor is out of whack, this will cause the conditions you describe. My personal guess is leaning towards the TPS as it is dominant towards higher RPMs. Youll find it towards the front, left side of the carb. If theres not a connector there, ignore everything i just said:P

Originally posted by drg84
Look for a "Little Old Lady" car at a junkyard with a Q-jet on it. More times than not, those are good carbs. Also, there is a mixture controll module on the later q-jets. If your TPS or O2 sensor is out of whack, this will cause the conditions you describe. My personal guess is leaning towards the TPS as it is dominant towards higher RPMs. Youll find it towards the front, left side of the carb. If theres not a connector there, ignore everything i just said:P

drg84, i need to know what year they put TPS switches on q-jets?

Thanks to everyone that helped..Learned a lot...I bought a factory remanfactured carb...Should work fine Am putting on today..