1998 Chevy Lumina suspected fuel injection/lines/pump

Tiny
JON01K01
  • MEMBER
  • 1998 CHEVROLET LUMINA
  • 95,000 MILES
So the car was bought about 4 months ago, and ran very good for the first couple of months. It passed state inspection, ran quiet, clean and shifts fine. Then recently starting from cold, I would have to do about 6-8 cranks before it would catch. If it did turn over, it be at a very low rpm and would putt putt out(sometimes poof sound). Once it cranks and you here it rev up, it would be fine. Then if driving for 30-40 mins, it will start struggling when giving it gas.(Like press pedal and gas isn't going through, usually tap it until it gets through). If it did cut off, or I was to turn it off. Then you would have to wait a good hour or 2 before it would catch again. It will crank, but almost like gas just isn't getting through. So I was getting a MAP sensor code, and misfire. So I changed the MAP sensor, and the fuel filter. The old one was clogged and gas that came out was pretty dirty. It does seem to run a little better, but still have the same issues at cold start(although goes quicker). The weird thing is it runs just fine on highway and everything, until symptoms return. Sears told me to change spark plugs and wires, but I don't think that is the immediate problem. I think it may be the fuel lines or pump going bad. Any advice will be appreciated, thanks!
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Wednesday, July 3rd, 2013 AT 10:22 AM

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Tiny
HMAC300
  • EXPERT
Scan for codes and check fuel pressure first
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Thursday, July 4th, 2013 AT 9:49 AM

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