I have a 1991 camaro 5.0 L TPI engine. The car just got fixed from a stalling problem which was 3 injectors flooding the engine. The car runs now but is very shakey and has no power and drives really thumpy. Ive replaced mt EGR valve, spark plugs, and spark plug wires. The car before backfired but so far i havent heard it, but i have not drove it on the highway yet. There is a knocking noise coming from the passenger side and when i put my head on top of the tuned port i could hear it, once i turn the car off i can still hear it but starts to go away. My mechanic checked the fuel pump and that was good, and he checked all the fuel related things like the pressure, injectors, etc. Also when ever i turn my A/C on smoke just loads the car up from the vents, it smells like gas or exhaust but only when i turn the air on it blows it into the car. I've just spent 500 dollars getting the car running and now this, what can be wrong with it?

 

The smoke, does it fog up the windows inside (slimey film)? If so, then your heater core has a leak. The smoke is the hot antifreeze in its vapor form. Dont breath to much of it because it is poisonous if too much is inhaled. Is the SES light on? If so, pull the codes. Seems like you may have a fuel delivery problem. What is the fuel pressure at the fuel rail? Pull of each plug wire while running to veriefy if there is spark.

 

when ever i take the car i dont see a film but i can definitely see smoke inside the car. And it smeels like an exhaust leak but its only when the air is on. No lights flash but infl rest comes on when the car starts and once in awhile the ses comes on but then goes away.

 

Theses light turns on when there is a problem. When it turnsback off by itself, that means that the problem corrected itself. Still you should jump A and B in the ALDL port and ****** the TC and let me know what it is so that I can help you further.

 

I did the paperclip thing where it goes into A and B and the only code that was flashing a million times was code 12. I recently had a friend redo my spark plug wires and when he started the car a big pop noise happened both of the times he started it. I looked it over and he mixed the order up so i redid them and now the car wont start it just keeps turning. i pulled each wire 1 by 1 and plugged one of my old spark plugs in it and seemed like cylinders 8, 7, and 6 werent getting any spark or atleast i could see it. The rest i could see but they didnt have a powerful spark. What should i do know?

 

A pop or backfire? Where is the pop? Front intake, muffler? Was the car running good before the spark plug wire change? If anything, it may be wise to change the dizzy cap, rotor, and the coil.

 

The car started fine before my buddy unplugged all the wires and plugged them back in, he thought they were out of order because the car was running very shakey and had a very thumpy pickup along with no pickup. After that pop i put them in the right order and the car wont start it just keeps turning but it sure does sound like it wants to start, i hear the car make the coughing noise and then it just keeps turning. It sounded like the noise came from the distributor but im not sure. It definitely came from the engine not the exhaust

 

It was a pop not a backfire, it seemed like i blew something up.

 

Try cranking the camaro and slowly press the gas pedal down (while cranking). This will prevent the camaro from flooding (flooding is possible with E.F.I.systems). Maby your the camaro will turn on. If it doesn't, was there by any chance that when your buddy pulled the wires off the dizzy that he accidentely turned the dizzy? If so, your gonna need your buddy again to help you out. If possible, disconnect the EST wire (my 86 IROC has it but I don't know if a 91 got it). Then loosen the dizzy from the engine so that it can spin by turn of the hand. Then have your buddy crank while you spin left and right. The objective is to find the sweet spot where the camaro will turn on. If you do find the sweet spot, and the camaro consistantly turns on and off, then adjust your timing acording to the manufature (mine is 6*).

 

If there was a pop in the ebgine area then I would remove the dizzy cap and inspect the guts of the dizzy. You might of had a electrical pop which sounds like a pop when somwthings shorts or burns out, especially when the coil delivers around 45,000 volts.

 

No all he did was talk the plugs off the cap and plug them in the order he thought was right. I just drove the camaro yesterday for 15 min and it still ran like crap but it ran and the minute the pop happened it wouldnt start back up. I think before he had like a radar gun or something that looked like it and he was seeing my timing and he said it wasnt steady speed or something like that.

 

But i did remember my mechanic said he put a new distributor in which its not new its refurbished from advance auto and the only work he did when i had the stalling problem was see if the fuel pump was good which he has to drop the exhaust and rear also he changed 3 injectors which were bad and he changed the distributor. Could anything that relates to the work he did cause the car to run shakey? like if the distributor isnt put in right or something like that?

 

There are a few thungs that would cause hesitation. Improper timing, bad injectors, low fuel pressure, and arching. At night,get the camaro stated and pop the hood. Look for any blue sparks. If there is any, that'll be the source of hesitation.

 

Now where would the blue sparks be coming from? any specific areas?

 

Look around the spark plugs and dizzy. Usually if there is arching, it'll be in areas where the spark plug wires touch the exaust manifold.

 

Alright and now if they are making a blue spark what would the problem be?

 

If you see a blue spark jump from the spark plug wire to any part of the cars body is bad. That leads to a miss fire. Arches can jump to other plug wires too. A miss fire is when a spark plug has little or no spark to initiate cylinder combustion.

 

Believe me today i thought it wouldnt hurt to check to see the spark 2 or 3 cylinders had spark because it shocked me the others i can see but no shock and 8, 7, and 6 i couldnt even see a spark. But i will say when i had the car running yeasterday it felt like i was only running on 5 or 6 cylinders because the car had no pickup, the only times it felt decent is when i would put it to first gear and the high RPMS it sounds healthy but low RPMS it sounds like crap and it runs the same way.