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low power, bad acceleration

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zekester
New User

Jan 21, 2007, 8:52 PM

Post #1 of 5 (2726 views)

low power, bad acceleration	Sign In

I have a 1997 chey cheyenne, 4x4, 5.0 litre engine, when i first start it, it starts really easy, idles perfect, after engine warms, i lose power, sputters and backfires, engine light does come on, but goes out after a while, have hooked to analyser, but nothing definate, have changed fuel pump, and filter, I did notice a celery like odor just before this happened, looking for suggestions, or any help, was wondering if plugged converter may be the problem, thanks in advance for any help

way2old
Veteran / Moderator
way2old profile image

Jan 22, 2007, 7:14 PM

Post #2 of 5 (2721 views)

Re: low power, bad acceleration	Sign In

From the linited information we have, I would say you are on the right track with the converter. What code was output by the ECM?

Being way2old is why I need help from younger minds

zekester
New User

Jan 22, 2007, 8:19 PM

Post #3 of 5 (2717 views)

Re: low power, bad acceleration	Sign In

Hey thank you for your prompt reply, the analyser showed o2 sensor, and temp. sensor, i replaced the temp sensor same thing, and the o2 sensor was ok after a reset was done, but its gradually getting worse, initally it was only after it warmed up that i was getting the low power, and sputtering, now its even wehn the engine is cool, I have to accelerate very slowly for it to pick up speed, and Im wondering if there is any way i can test the converter to see if it is plugged, , thank you in advance, have a great day

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jan 23, 2007, 2:11 AM

Post #4 of 5 (2715 views)

Re: low power, bad acceleration	Sign In

A vacuum test should show an exhaust restriction. It would usually be the converter as way2old mentioned but you can test for it, T

zekester
New User

Jan 23, 2007, 2:42 AM

Post #5 of 5 (2710 views)

Re: low power, bad acceleration	Sign In

Thank you very much, I will certainly try that, you guys are great with your prompt replies, have a great day

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