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Replaced intake gasket on my 92 chevy 5.7 TBI and now won't start. It does have 206000miles on the motor. I've triple checked the firing order and #1 at TDC lined up right. WON'T START. DRIVING ME NUTS. it does have spark and is getting fuel. Plugs are black as if it has been running rich. Ran fine before. I've done at least 15 of these distributors and never had ne problems. HELP ME I WANT TO DRIVE MY TRUCK. collapsed lifter?Bent push rod? Slipped timing chain?

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SOURCE: 95 GMC Jimmy 4.3l W vin rough idle

My problem was solved when I repaired my 4 wd activation dash switch. The switch was contacting on 2WD & 4HI at the same time. The front differential activation is vacuum activated possibly creating a tug of war that didn't actually engage it but drained off vacuum from the engine? A theory at best but stumbbled across it because I knew the switch wasn't working properly I repaired it and low and behold rough idle disappeared and all is good for 3 weeks running.

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SOURCE: My 1988 Firebird won't start. The starter

Could try the crank sensor, that is where I would start. Next would be the timing & compression.

Posted on Jun 24, 2011

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SOURCE: my truck starts like it

replace the batery cables (they corode in the middle and, look fine on the outside but, when you cut them in half they are filled with gray corosion dust; causing very high resistance.

Posted on Jun 29, 2011

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You have problem with you timing or did you ever label all the high tension wire before you unplug it. it might be re arrange the firing sequence. 1342 firing order. And the timing position of the distributor were at original place.

Posted on Aug 16, 2011

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SOURCE: 1987 chevy s-10 2.8 motor. Wont start and gas

it keeps flooding out

Posted on Oct 21, 2011

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If it's backfiring through the intake, then more than likely it's a timing issue. The distributor cap has the cylinder numbers molded into it where the plug wires go... Make sure the wires are in the right spots. If that's good, then it's possible the distributor isn't lined up right.

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It could be the intake gaskets, or it could be that the upper intake is starting to fail. Both are common problems. How fast are you losing coolant? If it's fast, then it may be the upper intake. Also, how many miles are on it, and has the upper intake been replaced before? It may be due for a new one.

Anyway, the procedure for doing the gaskets and for replacing the upper intake are exactly the same, except that if you replace the upper intake, you put on the new one instead of reinstalling the old one. I've done this with mkaake over a couple of days. There's a lot to remove and replace, but nothing that's especially hard to do. Have a service manual of some kind on hand, and do some serious research before you take it apart.

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That's all I can think of right now. I also don't know prices. Maybe someone else will have that info.

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I have the same year truck as you do. Replaced engine last year and now this same exact thing is going on. I've talked to several people with the same problem. They have said to check the distributor and see if the bushing is worn out. This will cause the reluctor wheel to hit or miss the CAM sensor. Causing the sensor not to get the correct reading. So I took my truck to a very reputable garage, sure enough 12% difference between the CAM and CRANK sensors. Now if the distributor needs a new bushing or replaced a Automotive shop has to "relearn" the the system. After you replace either one. So that they are working together.

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