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5.7 v8 rough idle, hesitation and shudders in reverse and drive only

I noticed some parts of the intake weren’t seated properly. I got it all put back correctly and also cleaned the MAF sensor. Since I’ve put on well over 1,000 miles of highway/backroads driving and haven’t noticed an issue at all. I wonder if the spray of the water knocked some components loose...
- 98sub1500
- Post #6
- Dec 29, 2023
- Forum: Engine Performance + Maintenance
Looking for proper (SAI) secondary air injection pump / plumbing delete information for 99’ 5.7L c1500

I am currently trying to do this same thing. I have a 1998 gmc suburban k1500. i bought the part number 12574378 cover and went to bolt it up, it is too big. not sure how to proceed, i might try to fab my own covers but don't really want to go that route if i have a choice.
- 98sub1500
- Post #4
- Dec 25, 2023
- Forum: Engine Performance + Maintenance
5.7 v8 rough idle, hesitation and shudders in reverse and drive only

First off, I drive a 1998 GMC Suburban K1500 SLE with the 5.7 V8. Not too long ago I had the rear drums checked, front brakes replaced and a brake fluid flush. Since then, never before, for some reason I have the occasional shudder/hesitation while on the accelerator and a rough idle ONLY in...
- 98sub1500
- Thread
- Dec 10, 2023
- 4l60 5.7 98 suburban brakes engine gmc rough idle transmission
- Replies: 5
- Forum: Engine Performance + Maintenance