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Comment by Kevin Lee on July 19, 2009 at 11:58am

And this started right after you did this? or was it already doing it? If it started right after you put it in, I suspect it is from the extra hydrocarbons the cleaner has in it. You engine is pulling it in from the PCV valve. If I am right, what I would do then is pull the PCV valve out, but leave it hooked up to the vacuum hose. finish running th cleaner, and then change your oil. Depending how bad your oil looks (How much the cleaner broke up carbon and sludge in the engine), you might have to run it agian for a short time to get the rest flushed out, and change it again. After that, put your PCV valve back in and see how it runs. It might take a few minutes for the PCM to adapt back to normal again

Comment by Kevin Lee on July 19, 2009 at 11:40am

What did you put in it Sheldon? And where? I just wonder if youput in a cleaner designed for the crankase into the fuel, really causing a problem. If you still have the bottle, make sure you did follow the ditrections properly. If it was a fuel additive, and it started doing that, I would suggest you contact the manufacturer, as something is obviously wrong with it. They should pay to have your fuel system flushed out.

Comment by Kevin Lee on July 14, 2009 at 8:10pm

Hey Tim, I cant remember the episodes, but try to find the Horsepower one where they fixed up the first gen Lightning. Those were naturally aspirated, and I think they may have even used a turbo on it. Either way, I am sure there is a link there form where they got it from

Comment by Kevin Lee on July 14, 2009 at 8:07pm

I hope I was helpful, and glad you fixed the problem!

Comment by THOMAS E EVERAGE JR. on July 14, 2009 at 10:12am

HEY I FOUND THE PROBLEM,I HAVE REPLACED THE EGR SENSOR ON THE TBI,AND PUT A NEW EGR VALVE,THE SENSORR WAS CRUDED UP WITH CARBON,KLEENED IT OUT BEST I COULD RUNS GREAT NOW!THANKS FOR ALL THE HELP,WELL MAYBE MY LUCK IS CHANGEING WITH CHEVYS,NEVER HAD MUCH LUCK WITH THEM ,I HAVE HAD MANY CAR AND TRUCKS ,BUT THE GMC AND CHEVY LINE HAS ALWAYS GIVEN ME SOME BAD HEADACHS,THANKS AGAIN FOR YOUR HELP

Comment by Kevin Lee on July 13, 2009 at 8:11pm

Not necessarily. There are default values built into the PCM in case of failure. Granted, it wont run as good as it should if it was hooked up, but it should run none the less. What does concern me that the shop couldnt establish communication with it. This could be the heart of all of your problems. Just start with the basics, and make sure you dont have any blown or missing fuses. After that you need to amke sure all computer grounds are good on the engine. One question, when you turn the key on, but dont start it, does the check engine light come on? It should as this is called a "bulb check"

Comment by THOMAS E EVERAGE JR. on July 13, 2009 at 12:10pm

WELL I TOOK IT TO A SHOP THIS MORNING TO SEE IF THEY COULD HOOK A COMPUTER UP TO IT,WELL THE COMPUTER COULD NOT COMINECATE TO TRUCK,AND ALSO UNPLUGED THE TPS AND IT STAYED RUNNING LIKE I NEVER UN PLUGGED IT?THOUGHT IT SHOULD DIE BUT DID NOT?

Comment by Kevin Lee on July 12, 2009 at 9:40pm

No problem, I didnt take it as anger. Some people like to use all caps anyway. The TPS is possible. I didnt mention it before because you said you had a misfire. A TPS would cause more of a hesitation. Just curious, before you had disconnected the MAP sensor, did you retrieve any codes from the PCM? I am sure there is a code in it for that now

Comment by THOMAS E EVERAGE JR. on July 12, 2009 at 9:24pm

Thanks,i just tryed the egr and it did not change anything,i am pulling my hair out trying to figer it out ,someone said it might be the tp sensor i guess i will just keep changing parts till it stopps,thanks for all of ur help and sorry about the capps earler i fogot it was on i wasnt upset

Comment by Kevin Lee on July 12, 2009 at 9:07pm

Fair enough, and you dont have to have smoke out of the exhaust. But like I said, unplugging the MAP is only covering up the problem, not a fix. OK, now you said you are getting a surge when going down the road? You did say you changed the fuel filter, you might have a fuel pump going out. And Thomas, I didnt say you definitely had a bad cylinder, just giving you some tips on how to test and find the misfire, and why

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