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I had my car tuned up and when I got it back it still ran rough and died. I took it back to the shop and they told me that two of the pistons weren't firing and didn't know why.
How was it running before you took it for a tune-up? Could the shop have accidently switched the wires for those two cylinders?How was it running before you took it for a tune-up? Could the shop have accidently switched the wires for those two cylinders?
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If the computer wasn't supplying the correct amount of fuel to the cylinder it can run lean which would increase the temperature in the cylinder and can cause all sorts of issues including burnt valves, rings, and holes in pistons.
You have a ruptured fuel pressure regulator diaphragm. The gasoline will leak past the piston rings and end up in the oil pan. You need to change the oil.
I was having a similar problem with my 2002 Envoy. Usually when accelerating at 60 and 90km/h it would have almost like a clunk and idled rough.
I took it into the shop and they said a tune up would be the first step to correct the misfire (25 options to choose from!) After pulling the spark plugs the 5th and 6th didn't look right. As a result my mechanic ran a compression test.
The 6th cylinder is only putting out 80lbs of pressure where as the rest were putting out 195lbs (factory says it should be around 215lbs). His recomendation was new motor or new vehicle.
3 years ago, my car was running really rough. No accelleration, stalling etc. I narrowed it down to the distributor and changed it myself for about 100 bucks. Then last week, the car would start sometimes and sometimes not. When it would not start, I found that it had no spark. So it finally quit altogether. I put the old distributor back in (Yes, I kept it), and it ran. It ran rough like it did 3 years prior, but it ran. I have purchased another distributor for $100, and will put it in, and it will fix the problem. The distributor is an all in one package. Coils, rotor, pickups. It's held on by 2 bolts (12mm socket). Pretty easy to change out, just pay attention to the way the rotor is pointing when you take the old one out, and put the new one in the same. 3 year lifespan due to a sh*tty oil seal on them.
check to make sure that the plug wires are in the correct order if so check the wires to make sure that they are not fouling out if you didnt replace them with the tune up id suggest that you try that.
Try checking the spark plug, and the spark wires, if that doesnt clear things up then try replacing the roter under the distributor cap and check the cap for any corrosen
How was it running before you took it for a tune-up? Could the shop have accidently switched the wires for those two cylinders?
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