Last post on Oct 13, 2013 at 7:47 AM
You are in the Chevrolet Silverado & GMC Sierra
What is this discussion about?
Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Truck
#189 of 421 Re: 2001 chevy silverado 1500 4.3 v6 [hiscokid]
Apr 01, 2008 (6:42 pm)
Does it usually throw a code for the cam sensor then? Yes. Once your code indicates a bad cam sensor, it should still be checked with a graphing meter. However, thats expensive and the sensor is probably only 45.00. No relearn needed. Once a cam signal is seen by the PCM it will fire the injecters. Your check engine light may take awhile to go off by it self, or just do a clear code reset with the scan tool. If for some reason you disconected your battery and lost any stored information. You can reset the trouble codes by cranking the engine for at least 10 seconds, and any codes pertaining to no start up will reset if there is still a problem.
Also, special note. If the new cam sensor has a small piece of cardboard stuck on the end of it, size and shape of a dime, dont take it off. Thats for adjusting the air gap when you bolt it in. I don't think yours has this, its just a bolt in plug and play type. Good luck
#190 of 421 93 C1500 Runs Badly
Apr 03, 2008 (9:02 pm)
My 1993 4.3L Silverado suddenly runs badly. Air filter is clean. All fuel lines appear ok. Only 1 fuel pump installed.
Just filled gas tank earlier that day. Reputable, high volume station, never any fuel quality problems.
Engine acts like it is starving for gas.
What should I check first?
#191 of 421 Re: 93 C1500 Runs Badly [deancolbe]
Apr 03, 2008 (9:03 pm)
easiest would be fuel filter
#192 of 421 Re: 93 C1500 Runs Badly [obyone]
Apr 03, 2008 (9:08 pm)
How often should fuel filters be replaced? Mine was last replaced in 04/2003.
#193 of 421 Re: 93 C1500 Runs Badly [deancolbe]
Apr 04, 2008 (1:11 am)
I would think that should be done on an annual basis depending on your mileage however most wait till so little fuel passes that it causes problems prior to changing. It's a cheap part and fairly easy to replace so I'd start there.
#194 of 421 Re: 2001 chevy silverado 1500 4.3 v6 [mickeymouse2]
Apr 04, 2008 (5:21 pm)
hello, I just wanted to update you on the truck. I got my scanner and plugged it in, got no codes. Decided to see if the truck would start and it did, I did nothing to the engine. Once it started It was misfiring alot but it seems like its progressively getting better. Does anyone have any other Ideas what it could be? Also does anyone know of a cheaper way to do a fuel injection cleaning other than bringing it to the dealer? thanks.
#196 of 421 Re: 2001 chevy silverado 1500 4.3 v6 [hiscokid]
Apr 05, 2008 (8:26 pm)
I had a similar problem last week. Truck starts fine when cold but hard starting, or won't start at all when at operating temp. Did some research and found some answers at fullsizechevy.com. A lot of the people posting there had the same issues. Found out the hard starting was caused by a leaking fuel pressure reg. On these 98-01 Sequential fuel injection Vortec engines the spider assembly and FPR are located under the upper intake manifold. once the FPR starts leaking, the fuel collects in the intake manifold and sits there flooding the engine. If the truck sits long enough the fuel will evaporate and the engine will fire. The fix for me was to purchase the upgraded Spider assembly for SFI vortecs, instead of just a FPR. This upgrade does away with the poppet style injecters and replaces them with real injecters and is complete including the FPR (GM#93441235) and is a direct bolt-in. From what I gather GM had to develop this because of problems and a recall in CA with the poppet style injectors getting clogged because of the additives in the fuel there. Since I had it installed I noticed the smoother idle, starts with just a touch of the key, and better throttle response. Haven't checked fuel milage yet but should be back to my normal 17-18 mpg city
#198 of 421 Re: 2001 chevy silverado 1500 4.3 v6 [biga4]
Apr 06, 2008 (7:39 pm)
My truck just started up the other day and is running fine now, it misses every once and a while but I'm thinking it was bad gas. Where can this upgraded spider assembly be purchased? I heard these poppet style injectors are nothing but problems. thanks.