[topdogli22]

94 Thunderbird running like crap. HELP!

I just picked up a 94 thunderbird to fix it up and the biggest problem with the car is that it hesitates and runs ruff as hell when you hit the gas. This is in Park. When i unplug the MAF sensor it seems to help it but doesnt get rid of the problem totally. Switched TPS sensor, didnt do it. I used a MAF sensor from another T-Bird and that didnt do it either. I changed plugs, no help. Wires look crappy but not arking. If i put my foot on the gas for a while it hesitates badly, stays around 3k rpm and i get a strong smell from the exhaust. It's bad. Almost like rotten eggs. If i unplug the MAF it wont hesitate that bad and theres no heavy smell. I just dont know what to do.....

 

[Midnight Tech]

2 questions topdog...1) are you getting a "check engine" light and 2) has the O2 sensor been replaced? Sounds like it may be staying in open loop mode.

 

[94tbirdie owner]

still haveing 94 t-bird problems?

First, the smell is from catalytic converter most likely. When they over heat due to way to much misfires over a long period of time they tend to clog up and just well melt. Get your hands on a temp gun and check the difference in front and after the cat there should be a big difference. Second check the air duck for a hole or cracks, and a good visual inspection on all the hoses even a small one after the MAF can cause huge problems. It creates an overly lean condition where too much uncontrolled air goes in the engine, another factor you can look at is your EGR 94 fords thunderbirds have a negative backpressure EGR and if its coming on at the wrong time can give you the problem your experiencing. Funny; if it is the egr, then testing it is just that; start the car, add some vacuum to the egr and see the stumble/stall. Any other questions just ask.