stumble throughout rpm range

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May 18, 2007 | 02:03 PM

RC_CADMAN

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Joined: May 2007

Posts: 16

stumble throughout rpm range

my lt1 tends to stumble between 1500 and 2000 rpm and then again at around 3000. also when i am driving 55 and put it in sixth the engine sort of backfires and bogs down. what would cause this?

May 18, 2007 | 02:19 PM

derbs

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Joined: Mar 2007

Posts: 117

How are your plugs and wires?? If they are good maybe the coil or hope to god its not the opti.

May 18, 2007 | 03:44 PM

oneclean97z

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Joined: Mar 2007

Posts: 301

From: North Houston, TX

possibly clogged or dirty fuel injectors, how is it in wide open throttle? if its okay then its more than likely the injectors

May 18, 2007 | 08:41 PM

RC_CADMAN

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Joined: May 2007

Posts: 16

well the plugs and wires have been changed. and the coil and icm were also replaced. still the same problem. oh and at open throttle it it spudders and backfires a little.