93' jimmy 4.3 sputters on acceleration

i have a 93 jimmy and when i am accelerating it sputters and has no power untill the rpms get high and im going faster. It also uses alot of gas. i've
checked the cylinder compression and all are good except the front 2 drivers side they are 5 psi too low. Could it be a bad head gasket? Or could it be a bad injecter pumping too much gas? Does anyone have any ideas?
Thanks in advance jeff
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vortec4x493 wrote:

I forgot to add that the exaust smells like im burning straight gas and it has pre-ignition also the computer isn't putting out any codes. ive had it on 3 different code readers
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Check the fuel pressure may be too high, is this a Vortec cpi or throttle body engine?

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its the multiport
Shep wrote:

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Common for the fuel press regulators and/or lines to leak fuel in the manifold.

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95% sure this is the CPI unit, I had the same thing happen. The earlier you get it fixed, the less problems it will cause you. The raw gas gets right in the oil as well and thins it.
~$1000 repair if a garage or GM does it. ~$500 repair if you buy the part and do it yourself. Or, if you are really adventurous, you can replace pieces of the CPI unit (regulator and nut kit) but this is not recommended by GM. www.s-series.org has some tutorials in the forums.
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i just took it to a garage today and he just called and said it was the spider injector leaking fuel. he also said i was probly getting about 6 or 8 miles a gallon. he said it would be like 300 or 400 to fix
Conan Ford wrote:

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That's a good price at a shop, unless he's just repairing the unit you have or replacing it with a reconditioned part. The unit itself is over $200 new closer to $300 if you get it online, closer to $500 retail. Have him replace the nut kit also, that's under $80 retail but will save you from having to replace that later and pay for most of the labor again.
On Tue, 21 Mar 2006 20:25:26 GMT, "vortec4x493 via CarKB.com"

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