Question about GMC K1500

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I have a 88 gmc sierra 1500 with 350 and throttle body it acts like it is stuck on choke i have replaced throttle position sensor,o2 sensor,temp. sensor,egr valve snd removed throttle body and cleaned . i have unpluged each of the injectors 1 at a time and it runs ok on 1 or the other but not both at same time . acts like to much fuel.

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  • 178 Answers

The idle air control actuator is a common problem in this type of fuel injection an is mounted in the throttle body also the map sensor should be on top of intake make sure is connected right and have full vacum if so just tap on it with engine running and will miss if it is faulty please let me know if this helped or need further assistance i'll be glad to help.

Posted on Mar 15, 2011

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Posted on Jan 02, 2017

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2006 GMC Sierra 2500 series replaced throttle body sensor and fuel pump getting fire and gas but will not start


Do you have spark at the spark plugs ? Also are there any lights lit on the instrument cluster , check engine , SECURITY ? What throttle body sensor did you replace ? TPS -throttle position sensor ! What engine does yours have because there are a few options for this vehicle , 4.3 , 4.8 , 5.3 , 6.0 L !

Apr 12, 2015 | GMC Cars & Trucks

1 Answer

Where is the aic on a 94 sierra


Its located right on the throttle body. If your talking about the air intake temp sensor, thats mounted by the air filter or in the plastic tube that goes off the throttle body to the air box, its a 2 wire hook up. The idle air control "iac" is located on the throttle body side. "iac" idle air control. "ait" is air intake temp. 2 totally diff sensors.

Feb 20, 2013 | 1994 GMC Sierra

2 Answers

I have a 1994 gmc 1500 truck with a 5.7 v8.one fuel injector is pumping fuel and the other injector is not!!!!i swapped the injectors and its not the injector.


Go to the parts store and get a noid light for your truck, plug it into the injector electrical and turn the engine over to see if there is electrical pulse, also check the fuel pressure, the pump needs 9-13 psi with the engine running. you know if there is no pulse your going to need to check the wireing first. let me know

Feb 10, 2011 | 1994 GMC Sierra

1 Answer

Truck starts but put to much gas truck die's and no idol


First check the throttle body controls.Start with the Mass air flow sensor.Then your throttle position sensor.Its likely that one of these are bad.I am assuming that the engine has had regular tune ups so that is not an issue.If this has not had a tune up start with that then move on to my suggestions.You should also replace the O2 sensors if you have not already done so.

Oct 18, 2010 | 1993 GMC Sierra K1500

2 Answers

Locting the throttle position sensor on a 2003 gmc yukon denali


The throttle position sensor is located on the throttle body. Which is in the front of the intake manifold.

Nov 29, 2009 | 2004 GMC Sierra Denali

1 Answer

Tps switch


The Throttle Position Sensor is a potertionmeter, and is connected to the throttle shaft on the throttle body it self. The best way to notice it, is the wire harness coming from the Throttle body on one side where the shaft is.

Good luck and hope this help.

Apr 14, 2009 | 1994 GMC Sierra

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