I have a 4WD 1998 GMC Jimmy 4.3L Vortec V6 and it started running hot then it shut off and wouldn't start back up... do you think there would be any way to fix without replacing the whole engine

You may also want to check inline fuel filters they may need replacing

change the trottle position sensor

you might want to look at your air filter coz it might be restricted.Also look at your plugs and for interests sake your air flow sensor.How does she idle when cold and hot?

On the vortec engines they require 56 pounds of fuel pressure to start a few pounds shy of that you have a dead vortec you will need a fuel pressure guage to verify

This happened to me I had to spray Starting fluid everytime eventually. Starting fluid wouldn't work after awhile. Its the fuel pump. Even though it comes on and works its not producing enough fuel pressure to start the engine. It's probably giving about 12-13lbs of pressure but it needs atleast 14lbs. of pressure. And a word of advice to buy a ACDelco original fuel pump if you don't want to have to replace it again in 1-2 years, it's more expensive but will last.

I have the same problem few days ago, and still didn't find any solution. Can any one please help?????


15

check your fuel filter first! wouldn't be a bad idea to add fuel injector cleaner next time too

Hi there. I just did a tune up on my 95 Jimmy with the same motor. The firing order is 1-6-5-4-3-2 and the distributor rotation is clockwise. I hope this helps.

Your fuel filter may be at it's life time and will need to be replaced. Start with the simple and replace that, the other thing also that would cause the engine to shut down would be a faulty oil pressure sending unit. What is the oil pressure on the dash when the engine shuts down. You need at least 8 PSI to have the engine stay running. Check your Fuel pressure at the shredder valve and you should be 62-65 PSI with the engine not running and fuel system energized, once the engine is running it should drop about 5PSI. The last thing that could cause this would be a bad ICM, once the ignition system heats up the ICM fails and the engine shuts down. A mentioned, start with the simple and replace the fuel filter and check your fuel pressure to ensure your fuel Sending unit has not gone bad and will need to be replaced. Good luck and keep me posted.

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800bfc68
hope this helps