Question about 1995 GMC Sierra C1500
I have changed the distributor
I would say it is yourTBI (throttle body injection)carburetor. Check fuel filters; there should be two. One on the carburetor and another on the frame under the passenger side. The other thing to check is your air flow sensor. It is on the intake hose to the carburetor if it has one. You can buy a spray to clean it out. I have had trouble with the whole carburetor there are injectors and they sometimes just stop working. If you have another used one try changing it out. I would just try to replace them instead of trying to fix one. There are three or four on the TBI and are easy to change out, or just change the whole TBI unit, I don't think they are very expensive for a used one.
There is another possibility and that is the fuel pump. It is inside your fuel tank. Check your fuel pressure it should run between 35-50LBs depending on the year. That will give you an idea of what your fuel pump is doing. Check your TPS (throttle position sensor) on the carburetor and make sure it is working good.; easy thing to take off and check with an OHM meter. Good luck
Posted on Nov 22, 2014
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Posted on Jan 02, 2017
SOURCE: I have a 2000 gmc
Sounds like TPS (Throttle Positioning Switch) They develop "hot spots" or wear spots usually at throttle positions that are commonly used alot IE: cruising speed. When they get hot spots they fluctuate looking for solid connection. Replace TPS.
Posted on Apr 04, 2011
ok ran great before changes. right. you say unpluged computor to set timing.. yes.. do you mean the plug on the firewall passenger side that looks like a fuse holder kindof..?? (set timing connector ) (tan /blk wire)
did it run good during timing proceedure??? wont be MAP that is engine vacume has nothing to do with what you have replaced.
proceedure is to set timing . shut off engine , plug in.. then restart.
yes timing moves as per ECM specs. check that timing did no get out one tooth when you replaced distributor. retime . restart
Posted on Feb 01, 2012
you have a ****** problem with only 2 gears to me that seems like the computer is miss firing if its a auto ****** or the clutch is worn out or it can be that the lever inside the ****** is broken so it wont change gears this can be a lot of possibilities sorry i dont know that much i need to drive the vehicle and take apart the ****** to see whats the problem maybe one of these things will give you an idea of whats wrong with it.
Posted on May 27, 2012
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