Sputtering Ty
- Thread starter Calypso
- Start date
Calypso
New member
Re: Sputtering Ty
Well done a complete tuneup and it appears I have a combination problem. The sputtering improved greatly, now it seems there is a sputter cough only within the 2000-3000rpm range. Under or over that RPM it seems to do fine. I have turned the boost way down as well. Is the TPS a possiblity for this problem?
Well done a complete tuneup and it appears I have a combination problem. The sputtering improved greatly, now it seems there is a sputter cough only within the 2000-3000rpm range. Under or over that RPM it seems to do fine. I have turned the boost way down as well. Is the TPS a possiblity for this problem?
Calypso
New member
Re: Sputtering Ty
Ok anyone know where i can turn next?
Plugs, wires, button, cap, fuel filter, gas, TPS, conoverter deleted, fuel press good. AFR looks lean at idle and low rpm, a lil fat AWOT....???? Still a serious cough/ stutter at initial take-off and OD rpms. Boost launch and high rpm driving is fine. THX-R
Ok anyone know where i can turn next?
Plugs, wires, button, cap, fuel filter, gas, TPS, conoverter deleted, fuel press good. AFR looks lean at idle and low rpm, a lil fat AWOT....???? Still a serious cough/ stutter at initial take-off and OD rpms. Boost launch and high rpm driving is fine. THX-R
![Quickstop [UK]](/data/avatars/m/5/5165.jpg?1570199786){kind=avatar}
Quickstop [UK]
Combating adversyty.
Re: Sputtering Ty
Vac lines? Inc the one to the canister at the front of the truck and the line running to the fuel tank?
Is your EGR plate smooth or recessed? If it's from RPM then the recess should be showing, if it's from anyone else then it should be a smooth plate.
Vac lines? Inc the one to the canister at the front of the truck and the line running to the fuel tank?
Is your EGR plate smooth or recessed? If it's from RPM then the recess should be showing, if it's from anyone else then it should be a smooth plate.
Fighting5thSVT
Active member
Re: Sputtering Ty
Probably couldnt hurt to see if there are any stored codes...
Probably couldnt hurt to see if there are any stored codes...
Fighting5thSVT
Active member
Re: Sputtering Ty
I had a N/A vehicle awhile back that sounded like yours and it was the cat.....Expensive trial and error piece to replace though, if thats not the problem
I had a N/A vehicle awhile back that sounded like yours and it was the cat.....Expensive trial and error piece to replace though, if thats not the problem
Fighting5thSVT
Active member
Re: Sputtering Ty
Be carful you don't overboost with no cat once you get it running right.
I was thinking IAC, but not sure how that would affect it under load. Maybe you have an injector thaty took a dump on you? Can you do a compression test to maybe find a culprit cylinder?
Be carful you don't overboost with no cat once you get it running right.
I was thinking IAC, but not sure how that would affect it under load. Maybe you have an injector thaty took a dump on you? Can you do a compression test to maybe find a culprit cylinder?
Fighting5thSVT
Active member
Re: Sputtering Ty
Just brainstorming....
Is your fuel pump stock? Maybe it is getting ready to quit completely on you soon.
Also can't hurt to check your O2 sensor to see if it is original either. I'm not sure if that has anything to do with your specific problem or not, but it's one of those tune-up things to consider.
Try searching different things like "surging" "rough idle" etc.....maybe something in one of those older threads will jump out at you
Just brainstorming....
Is your fuel pump stock? Maybe it is getting ready to quit completely on you soon.
Also can't hurt to check your O2 sensor to see if it is original either. I'm not sure if that has anything to do with your specific problem or not, but it's one of those tune-up things to consider.
Try searching different things like "surging" "rough idle" etc.....maybe something in one of those older threads will jump out at you
Calypso
New member
Re: Sputtering Ty
Walboro upgraded pump changed 10k ago....I hope not. This is a first, works right under a good load, now it will not take light throttle. Surely someone has had this problem before
Searchin so far, but can't exactly find the same issue. Like I said AFR reads lean in gear at low RPM, and a tad rich when you mash it, and the sputtering clears out...like an old carbuerator...lol
Walboro upgraded pump changed 10k ago....I hope not. This is a first, works right under a good load, now it will not take light throttle. Surely someone has had this problem before
Searchin so far, but can't exactly find the same issue. Like I said AFR reads lean in gear at low RPM, and a tad rich when you mash it, and the sputtering clears out...like an old carbuerator...lol
Fighting5thSVT
Active member
Re: Sputtering Ty
On a side note, I remember hearing about "fake" Walbro pumps on Ebay a while back. Just in case yours was purchased there.
On a side note, I remember hearing about "fake" Walbro pumps on Ebay a while back. Just in case yours was purchased there.
Quickstop [UK]
Combating adversyty.
Fighting5thSVT
Active member
Re: Sputtering Ty
I'm not sure I remember exactly what his issue was? Anyone got a link?
I'm not sure I remember exactly what his issue was? Anyone got a link?