1998 Chevy Blazer runs when it want

Tiny
BEEMERMAN2010
  • MEMBER
  • 1998 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 220,000 MILES
Truck started to run rough. Check engine light came on codes read, #1 cylinder one misfire, #2 multiple cylinder misfire dectected. I put about 100 miles on it parked it for the night. The next day went to start and after about 4-5 time cranking it over it started. I drove it to the store about 1 mile total then parked it. About 10 mins later I went to leave again and it would not start. So I changed all six spark plugs which took me about 2 days due to other obligations. After changing the sparks it still took a couple trys to get it started (note: check engine light turned off and engine was runing smooth). I drove it to the store filled it with gas. Parked it for about 4-5 hours. After about two trys it started again I let it run for about 10 mins then turned it off (note: this is at 3am when its about 50 degrees I was geting ready for work and figured I would test the truck again) turned it off. Let it sit for about 12 hours and now it wont start again at all. I know its getting fuel because I checked on the out flow side of the filter. What should I do now? I need this back on the road asap. And would like to do it as cheep as possible. Please help thank you
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Saturday, October 16th, 2010 AT 5:50 PM

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Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Check for spark which I would expect that you have and if so need to check fuel pressure
very common for the fuel pump to fail
fuel pump will continue on working but will not provide the pressure needed
use a fuel pressure gauge and check fuel pressure, any reading under 60 PSI pump is no good and need to be replaced
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Sunday, October 17th, 2010 AT 8:50 AM

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