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Cars > Metalmikejr’s Garage > Blog > 1993 GMC Sierra (93 to 53 beast) > Truck help


Metalmikejr’s Profile Photo


M –26
Trenton, Ohio
United States


Metalmikejr’s Blog Posts 1 – 5 of 28

Truck help

By Metalmikejr

Filed under: 1993 GMC Sierra (93 to 53 beast)

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My truck is finally up and running again. Its still has the same problem though. I replaced the IDLE AIR CONTROL sensor my shif solenoids are good but when i take off its very very sluggish and rough. Im going to run a new diagnositc check for additional codes. Any ideas. and what does the TCC sensor do? Now it also seems that my alternator is bad, could that be a source of my problem. Somebody also told me that it could be my thermostat since thats out of my old engine. (ZZ4 350 MPFI runnin about 525 HP) or my Mass Air Flow Sensor. I dont have all my vaccum lines hooked up either. any of them actually.

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Read comments on this blog post 1 – 4 of 4

FriedGreenTMater’s Profile Photo
Sep 2, 2010 at 8:31 am
"Its still has the same problem though."
That says it is something you didn't change like the computer?
"very sluggish and rough" could be the timing is retarded.

Get a vacuum gauge and google "vacuum diagnostics" It is amazing what a vacuum gauge can tell you.
BigNuttyPaul’s Profile Photo
Sep 2, 2010 at 8:04 am
well are you running fuel injection? If so how is the computer getting a signal from a map sensor without vaccum? Plus if you are running injection you need vaccum to run the fuel pressure regulator. If the regulator doesn't have vaccum it will run at full pressure all the time causing the engine to run rough at low rpm but fine at mid to high rpm. I hope that helps.
mc84_zz4’s Profile Photo
Sep 1, 2010 at 8:15 pm
Here is a great DIY post on how to fix it:
hotodwilly’s Profile Photo
Sep 1, 2010 at 6:00 pm
wished i could help but im pre 80 old school

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Cars > Metalmikejr’s Garage > Blog > 1993 GMC Sierra (93 to 53 beast) > Truck help

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