The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - stumbling/misfiring at 2500-3000 rpms

68gmsee · 07-31-2009, 10:04 PM

Sounds like a good problem....

Seems to me that if it runs well at any time other than a steady speed, you shouldn't have ignition problems.

The question is, what is happening when you're at a steady speed? You're not moving the throttle much but at acceleration or wot you are. Could it be throttle position sensor? EGR valve? Vacuum leak? Just throwing out suggestions.

07-31-2009, 10:04 PM	#2
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: stumbling/misfiring at 2500-3000 rpms Sounds like a good problem.... Seems to me that if it runs well at any time other than a steady speed, you shouldn't have ignition problems. The question is, what is happening when you're at a steady speed? You're not moving the throttle much but at acceleration or wot you are. Could it be throttle position sensor? EGR valve? Vacuum leak? Just throwing out suggestions.