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My 1994 Chevy cheyanne 1500 4.3 ltr v-6 will not start now and was missing and backfiring right before ?

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  • Cars & Trucks Master
  • 3,679 Answers

Misfire etc indicates a timing problem so i'd start there

Posted on May 08, 2014

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Posted on Jan 02, 2017

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SOURCE: How to replace a heater core in a 1994 chevy 1500

As with all vehicles it seems the first part that they build around is the heater core. It is under the dash above the floor housed in a black plastic sealed box. Sealed with goop. Locate that box and start removing everything around it that is peventing taking the cover off. Of course disconnect the heater hoses under the hood a thefirewall.

Warning it is never as easy as it sounds.

Posted on Nov 29, 2009

riceski
  • 1851 Answers

SOURCE: headgasket done starts up it missing 1500 revs

ok here is your check list.
1- Check spark plug wires. loosen all plug wires - then while the engine is running remove one at a time CAREFULLY and be WARNED - this can [ if the wires are bad] give you a little bit of a non harmful shock so again be careful if your trying this.
2- Check CLOSELY for a Vacume leak- this is common when doing a head gasket. make sure if you have power steering that the hose to the brake booster is hooked up too. Check the PVC valve connection too.
3 - if you get this far - pull the plugs and check to be 100% sure you didn't accidentally close or open one too far. If you used old plugs put new ones in.
4-Check timing to be triple sure it is set properly.
5- if you have coil packs check them closely to be sure they are all firing properly.

I hope this helps

Posted on Mar 17, 2010

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SOURCE: 1996 Chevy C 1500 Backfired

it may be the fat red wire coming out of the bottom of the distributor which may of caused it to backfire. this not a 100 percent answer. maybe a possibility. good luck.

Posted on Oct 15, 2011

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