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88-98 FAQ's "Is your truck running weird? Check here it could help"
Post your threads here for the new 88-98 FAQ post which will be a separate sticky when complete.
Please make sure that the pics are uploaded to this sites gallery when used here to ensure the URLs are still there later for when we are looking through this thread for help, Thanks. |
Re: 88-98 FAQ's
Ill add more when i find some good ones to help
High idle problems http://67-72chevytrucks.com/vboard/s...d.php?t=439984 EGR identification (thanks Chevytech) http://shbox.com/1/EGR_ID.jpg |
Re: 88-98 FAQ's
Scott – dig through these and see which ones you want.
I will work on this more later. Running Rich, or acts like no choke = Coolant sensor testing: http://67-72chevytrucks.com/vboard/s...d.php?t=322811 http://67-72chevytrucks.com/vboard/s...d.php?t=379142 *************************************** Tighten up Tilt column links; On C/K trucks in 1995 they went to a “new” style column. If your truck is a 1994 or older the following information should help. Here are some steering column sites with photos that tell how to repair loose tilt columns. The photos should be helpful. http://www.fieros.de/en/articles/steering.html http://elcaminocentral.com/article95.html Looks like on this site he did the quick fix and did not take it apart far enough to tighten all four fasteners. http://www.chevyasylum.com/column/tiltcol.html Exploded View of a tilt column. http://www.nastyz28.com/tech/e-tiltcol.html Older car but good photos http://buickperformance.com/tiltstee...lumnwobble.htm *********************************** Tilt column lock plate removal; http://67-72chevytrucks.com/vboard/s...ht=tilt+column ***************** Fuel pressure testing – split hose in tank: http://67-72chevytrucks.com/vboard/s...d.php?t=375132 ************************** Set timing wire connector for 1988- 1993 C/K pickup trucks illustration: http://67-72chevytrucks.com/vboard/a...1&d=1251120221 |
Re: 88-98 FAQ's
This is gonna be a great help to those who seek help, without asking "where, who, etc.," before doing a search for the help they need. There's a lot of information on here that people can access, if they will just take the time to utilize the already available resources.
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Re: 88-98 FAQ's
Cleaning evap core for better a/c function
Edit: Also wanted to say that an 88-98 FAQ section is a terrific idea -- it seems like every day there's somebody with EGR/IAC/ECTsensor problems. The FAQ section should be subtitled "Is your truck running weird? Check here first!" |
Re: 88-98 FAQ's
1991 & later TBI V8 Oil pressure sending unit location, engine wiring & sensors illustration:
Also shows ground on back of passenger cylinder head. http://autorepair.about.com/library/...bl283a-lib.htm TBI V8 Knock sensor location photo from “PCMCOBRA”, from one of the truck boards. http://i114.photobucket.com/albums/n...010Small-1.jpg Dash Brake indicator on or blinking = RWAL problems Here are two of the better threads http://67-72chevytrucks.com/vboard/s...d.php?t=302690 http://67-72chevytrucks.com/vboard/s...d.php?t=399153 TBI parts & sensor photos EGR (Exhaust Gas Recirculation) valve EGR solenoid IAC (Idle Air Control) MAP (Manifold Absolute Pressure) sensor TPS (Throttle Position Sensor) All labeled in photo of 1993 Silverado: http://67-72chevytrucks.com/vboard/a...1&d=1278787232 |
Re: 88-98 FAQ's
HOW TO: Manual locks and windows to power conversion
http://67-72chevytrucks.com/vboard/s...d.php?t=445732 |
Re: 88-98 FAQ's
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Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
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Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
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Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
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FAQ seems limited (I think) 1988 GMC Sierra SLE 2500 ( Is this where I am supposed to post my inquiry?) Thanks |
Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
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A parts store would be the best place to find one i would think.. This part of the forum is just for posting FAQ's |
Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
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Link http://cgi.ebay.com/New-Part-WIPER-P...item3a66661054 |
Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
I didn't see this one posted about weird running, I thought I'd share what I learned from Chevytech:
If your TBI engine is acting like a bad fuel pump, or bad filter, almost stalling and then recovering, like it's almost running out of gas... check the little rubber hose in the gas tank, between the fuel pump and the steel fuel line, down in the tank. If it looks old at all, replace it. If it gets a pinhole it can make the truck act strange due to low fuel pressure. |
Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
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Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
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WHO has the correct one? They claim it is for an '88, but they are wrong. |
Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
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Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
Post here for links of helpful info to share with others, if this thread does not answer your question about your truck please post it in the forums, thanks.
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Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
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If you remove the distributor from a First Gen. Vortec engine
If you remove and replace the distributor in a generation I Vortec engine, it's correct position must be checked by scanning the cam retard number. According to GM it's referred to as the Camshaft Retard Offset Adjustment.
Here is the shop manual page for it. http://carphotos3.cardomain.com/imag...arge.jpg?modal The timing of a Vortec is not adjustable but the position of the distributor must be at a reference point of 0 degrees +- 2. This will have an effect on idle quality and fuel economy at least. We know without doubt that a Snap-on Solus, Solus-Pro and Modis will show the cam retard value. Others may, but I'm not aware of them. Just to let you know, mine was reinstalled without checking the cam retard going back as far as 2005. I was careful to reinstall it each of 3 times doing the intake gaskets. It never gave a code after the install. The last time a week ago after a complete rebuild, it was at -13*. Never had a code. Now here's one thing you won't read in any shop manual. Once I got it to 0, in no time it threw a code 1345. Let me repeat that. I was off for over 6 years and never threw a code. After I set it to 0, it threw a code. My recommendation comes from others that have experienced the same thing. Set it slightly negative. The spec is +-2 away from 0. Again I want to repeat for people using "google" looking for this information. If you remove and replace the distributor in a generation I Vortec engine, it must be checked by scanning the cam retard number. |
Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
Uh, and what years is a Generation 1 Vortec??
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Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
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IIRC |
Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
Actually the L31 was used in the following
1996–2003 Chevrolet Express/GMC Savana full-size vans 1996–1999 Chevrolet/GMC C/K full-size trucks 1996–1999 Chevrolet Suburban/GMC Suburban full-size long-wheelbase SUVs 1996–2000 Chevrolet Tahoe/GMC Yukon full-size short-wheelbase SUVs 1999–2000 Cadillac Escalade The basic block is still in limited production as a crate engine as several versions including the ramjet 350. |
Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
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Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
Axle ratio by RPO codes.
http://67-72chevytrucks.com/vboard/s...ight=RPO+codes http://67-72chevytrucks.com/vboard/s...67&postcount=3 Monitoring open or closed loop status on OBD1 vehicles: http://67-72chevytrucks.com/vboard/s...4&postcount=13 Heated O2 senor upgrade & heated air intake. http://67-72chevytrucks.com/vboard/s...3&postcount=12 http://67-72chevytrucks.com/vboard/s...=heated+sensor Mismatched injector on 1987 4.3L light duty truck engines. http://67-72chevytrucks.com/vboard/s...87&postcount=4 These two long threads cover most problems that can happen with the TBI fuel system trucks. 4 page thread on TBI diagnosis. http://67-72chevytrucks.com/vboard/s...d.php?t=348308 3 Page thread that EGR fixed. http://67-72chevytrucks.com/vboard/s...d.php?t=347247 Stalling - Code 54 – Thread covers Fuel relay & oil switch for fuel pump. http://67-72chevytrucks.com/vboard/s...d.php?t=495054 No fuel – burnt fusible link – code 54 http://67-72chevytrucks.com/vboard/s...d.php?t=460116 Checking OBD1 computer codes without a scan tool. http://67-72chevytrucks.com/vboard/s...5&postcount=11 V8 Vortec distributor installation & code 1345 Thanks to bwood http://67-72chevytrucks.com/vboard/s...ighlight=P1345 |
Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
Wow, good ones there, thanks chevytech ;)
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Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
Thank you Scott!
Here’s another one: V8 Vortec distributor installation & code 1345 Thanks to bwood http://67-72chevytrucks.com/vboard/s...ighlight=P1345 |
Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
Excellent thread; subscribing -
K |
Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
How to set the timng on 1988-1993 C/K trucks:
http://67-72chevytrucks.com/vboard/s...85&postcount=4 In 1994 the connector was moved inside the cab next to the computer. On the square body TBI trucks the connector is by the brake booster. |
Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
Great info chevytech. I have a question for you, I have a 98 W/5.7, 4WD, 1/2 ton. The problem is it stumbles at higher speeds when climbing an incline. Example-Driving on the highway at 70 and start to go up a hill it wants to stumble/shake as its trying to downshift. This happens whether I'm pulling or not. Your help is appreciated.
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Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
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Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
Testing of the 88-95 EGR system:
http://67-72chevytrucks.com/vboard/s...d.php?t=583327 |
Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
I didn't see this any where. So a a few years ago I replaced the 350 in my 95 K2500 PU with a 350 from a 88 K1500 Suburban after I got it all together and drove it the Trans didn't shift right and before the swap I had no problems with the trans so I started swapping all the electronics and sensors from the 95 350 and still no good. I only had one more thing that I could change and that was the Knock Sensor which I didn't think could have anything to do with the trans. After changing it the trans shifted fine turned out the part number of the sensors were one number different. Hope this helps somebody doing the same swap.
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Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
I have a 95 c 1500, 350 5.7 TBI I am having problems with the truck starting sometimes.Engine wants to turn over,but doesn't until I pump the gas pedal a few times then the engine starts and runs.Fuel or electric issue? Or both?
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Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
Identifying Drop Spindles & How to cut Coil Springs.
http://67-72chevytrucks.com/vboard/s...21#post6466621 |
Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
Just got my 1988 Chevy Silverado 350 auto tranny 196000 miles. Seems to run good but in drive with brake on, oil pressure drops to almost 0. I am the 4th owner, 2 older men and an older woman.
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Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
I have found 2 websites that could be helpful at times and kind of gives a break down on a lot of different components.
www.aa1car.com www.2carpros.com |
Re: 88-98 FAQ's "Is your truck running weird? Check here it could help"
Stumble only at idle yet normal power everywhere else? Black smoke from the exhaust when you stab the throttle after idling for a few seconds? Do the paper on the exhaust pipe trick, if it gets sucked in, most likely an exhaust valve not sealing, could be a burnt valve, stuck open from carbon, or in my case, a bad mechanic lashed the exhaust valve too tight. The low rpm does not allow the cylinder to build enough pressure to ignite the fuel, at higher rpm the increased piston speed moving the air faster builds enough pressure before it can leak out the exhaust valve to ignite the fuel, hence only the stumble at idle.
http://67-72chevytrucks.com/vboard/s...d.php?t=635082 |
Re: If you remove the distributor from a First Gen. Vortec engine
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