Question about 1995 GMC Sierra C1500
1995 GMC SIERRA C1500, 5.7L, TBI, 70,000 MILES, (IT STARTS CHUGGING ON THE INTERSTATE AROUND 70 MPH). I Just Installed The Following New Items: Spark Plugs (Gap was set on the Plugs), Spark Plug Wires (Dielectric grease was used), Distributor Cap, Ignition Rotor, Air Filter, PCV Valve, Fuel Filter, Mobil 1 5W30 Oil, Oil Filter. --- COULD THIS POSSIBLY BE AN EMMISIONS PROBLEM?
that has a votec engine in it the fuel pressure is droping at knight and it takes 60 psi before the injectors will fire most likely cause fuel pump ,leaking injector ,or a feul pressure regulator
Posted on Jul 14, 2009
Did you check the timing?
Mine would idle rough and hesitate. I replaced all kinds of parts before finding out it was a bad ECM (computer) I found a used one for 50 bucks or so that fixed it.
Posted on Apr 19, 2010
First off, I appreciate your thorough description of what the symptoms are, ok lets go on. It sounds like your air/fuel ratio is off and is getting progressively worse. I don't think you will get this on the first guess. There are things you need to check out with the trucks systems to help narrow your search down. I don't know the trucks maintenance history but if you know that may help.
Look at the EGR valve, if it is stuck that would let an uncontrolled amount of exhaust gas back into the engine for reburn.
If the CAT is clogged the excessive back-pressure would cause the engine to run richer thus loosing gas mileage.
You really need a scan-tool to help. This type of device would allow you to look at live data and see if the component is operating within the specified range. Also a repair manual would help describe to you, the procedures to test suspected components. If you have anymore questions, let me know.
Posted on May 16, 2010
Smell of the oil,to see if the fuel injector(spider)is leaking into the crank case,if so,the intake will have to be removed to repair the problem,oh,and change the oil.
Posted on Jul 11, 2010
Tips for a great answer:
Apr 13, 2014 | 1995 GMC Sierra C1500
May 15, 2013 | 1995 GMC Sierra
Jan 30, 2018 | 1998 GMC Sierra
Sep 20, 2017 | Dodge Ram 2500 Cars & Trucks
Jan 25, 2012 | 1995 GMC Sierra
Jan 14, 2011 | 1995 GMC Sierra C1500
Aug 30, 2010 | 2005 GMC Sierra 2500HD 4WD
May 21, 2009 | 2004 GMC Sierra
Jan 28, 2009 | 1995 GMC Sierra C1500
Aug 12, 2014 | 1995 GMC Sierra C1500
133 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: