Question about 1990 Chevrolet S 10 4WD

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How to i know if distributor is bad on 1990 chevy s-10 tahoe addition pick up?

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First things first do you have strong spark. So the best way to do this is to go get a spark load tester from your locale auto parts store, it will cost around $5-10. spin the load tester out a bit and if the spark does not jump the gap you will have a weak spark and the cap and rotor need changed. check inside the cap for burnt holes inthe contacts also. cracks in the cap will allow moisture in and also allow spark to jump out of place and mess things up as well...
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Posted on Jun 03, 2010


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My 1998 Chevy Tahoe shakes real bad about 50 60 miles per hour and stopped at my 75 what's the problem

Jason, it can be a number of things causing the vibration..check the obvious first like Glenn Blevins answer. If that doesn't help then go on to the less obvious things..Like...
Hard starting or getting real bad gas mileage? (I know, the mileage sucks to begin with..I own a 2000 OBS Tahoe Limited so I know the mileage sucks!)
*Fuel pressure regulator..
*Spider fuel injection..Check these to make sure pressure is holding good.
*Distributor..They wear and act crazy...I'm in the process of changing mine now...It made my Hoe shake badly!
I don't know what the mileage is on your Hoe but I would say it's about time to start checking all the things I have mentioned.
There are lots of really good forums to get info on these trucks..OBS (Old Body Style) trucks have a large cult following so you will not be at a loss for info.
The vibration started at about 40 mph and would chill out around 65 mph...I knew it wasn't tires/rims on mine so I hit the forums and found a new world of info and testing to do on mine.
If it turns out to be a worn distributor on yours, go to ebay and purchase an billet aluminum made one..about 5-10 dollars more than the stock plastic shell OEM one that came on the truck.

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1 Answer

Spark plug wiring diagram for 05 tahoe

Greg Bernett 2821 Solutions February 14, 2010
You didn't post your engine size so please pick the applicable diagram:

1996-98 4.3L Engines Firing Order: 1-6-5-4-3-2Distributor Rotation: Clockwise

1996-98 5.0L, 5.7L and 7.4L Engines Firing Order: 1-8-4-3-6-5-7-2Distributor Rotation: Clockwise

4.3L Engines Firing order: 1-6-5-4-3-2 Distributor rotation: Clockwise

4.8L, 5.3L and 6.0L Engines Firing order: 1-8-7-2-6-5-4-3 Distributorless ignition system (one coil on each cylinder)

5.0L, 5.7L and 7.4L Engines Firing order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise

Source: spark plug wiring diagram for 98 tahoe

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    ledsled378 2926 Solutions July 24, 2010

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Source: Need diagram for spark plug wiring for 1997 Chevy

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    Dennis Weid. 44272 Solutions September 16, 2008

This was all I could come with, hope it helps.


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I was given a 1994 s10 Chevy Tahoe vortex blazer??????? It's either a S-10 pick-up or it's a Tahoe or a Blazer not all three . So which is it ?

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Need a serpentine belt wireing diagram for a 1990 chevy c 1500 454ss pick up truck

For the 1990 Chevrolet C1500 454ci = 7.4L V8 = "ss" = "big block"

Click on the the following: direct, Free Link. It has the Serpentine Belt Diagram for the 7.4L (454ci).
I'm not sure what you want on the "wiring" part??

Let me know if this helped, or if you have the additional informations or questions. Feel Free to contact me at!

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1990 chyrsler new yorker stalls at idle speed,  code 11 ,manual says no distributor refrence signal. there is no distributor.

Bad Distributor, change and that will take care of the problem the reference signal comes from a disk and a pick-up in the distributor

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i believe you will have to disassemble the distributor and shaft assy to replace. honestly may be cheaper and easier to replace whole distributor (minus module) with good rebuilt. will at least save time and frustration if that is in fact what is wrong with it

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