Mechanics

ANY IDEAS ON WHAT WOULD MAKE IT NOT HARDLY RUN AND NO ENGINE LIGHT ON?

2003 Chevrolet Suburban • 20,800 miles

Was driving home and noticed the engine light flashing. When going around a corner at a slow speed it died. Would start but ran very rough and you had to keep giving it gas to keep running. Towed home and once home the engine light is no longer on. Changed fuel filter & spark plugs. No code is being thrown. A friend checked the fuel pressure and says there is no pressure and thinks it the fuel pump. Just replaced the fuel pump about 2 years ago. Probably less than 40,000 put on since then. When it quit someone stopped and there was fuel pressure under the hood. It shot out. Any ideas on what this could be?
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Reaganx5
May 29, 2012.



That is 208,000 miles!

Tiny
Reaganx5
May 29, 2012.
So it's still having the problem? What did plugs look like?

Tiny
Fixitmr
May 29, 2012.
Retest the fuel pressure. What sort of pressure, if any, is the pump delivering? If nothing, see if the pump is receiving power. If not check the relay and the fuse.

Then have it scanned for soft codes. The blinking CEL means a soft code that isn't serious enough to cause the CEL to light solid, but bad enough to cause catalytic damage. You have to specify that you want soft codes pulled, because the less expensive scanners won't do it.

Rivermikerat
May 29, 2012.
We put new plugs in. Light is no longer blinking but it still runs very rough. Have to get the RPM's up to get it to even partially run.

Tiny
Reaganx5
May 29, 2012.
Have you replaced the cap and rotor?

Tiny
Czr1760
Jun 1, 2012.
Again, have it scanned for soft codes. The blinking CEL says at least one was set. And most cheap scanners won't pull soft codes.

Also, check for loose connections and vacuum leaks.

Rivermikerat
Jun 1, 2012.