small sputter
- Thread starter TwistedTy
- Start date
supersports10
New member
Re: small sputter
when was the last time you did a tune-up??
when was the last time you changed the ignition module in the bottom of the distributor??
TwistedTy said:
when was the last time you did a tune-up??
when was the last time you changed the ignition module in the bottom of the distributor??
supersports10
New member
Re: small sputter
ignition module is cheap insurance it's like 35.00
and 30 min install.
also check the ignition timing.... it should be at 0 , with the brown wire disconnected.
TwistedTy said:
ignition module is cheap insurance it's like 35.00
and 30 min install.
also check the ignition timing.... it should be at 0 , with the brown wire disconnected.
12secondSY
Syty Killer :(
Re: small sputter
Mine sputters in a lot of places especially under boost. Everything is new except the coil so that getting replaced soon.
Mine sputters in a lot of places especially under boost. Everything is new except the coil so that getting replaced soon.
Ian Turgeon
Cascading Inspiration
Re: small sputter
I put on JSM's 3" dp last weekend, and I've been noticing the same thing (actually its just worse then it was before) under light throttle and sometimes coming off a stop light. it stumbles for a couple of revolutions before it continues driving fine.
I've been chocking it down to my higher stall converter + open exhaust needing some tuning work.
I put on JSM's 3" dp last weekend, and I've been noticing the same thing (actually its just worse then it was before) under light throttle and sometimes coming off a stop light. it stumbles for a couple of revolutions before it continues driving fine.
I've been chocking it down to my higher stall converter + open exhaust needing some tuning work.
ZavzTy547
Senior Member
Re: small sputter
All of the above and then some.
It could also be the chip....
My truck occasionally sputters when my STG chip is on a rich setting (t1-17). If I use a lean setting T2-22 it goes away.
If you did a full tuneup and it's still sputtering, try turning down the FP a 1 or 2 psi and see if it goes away or make sure your timing is 0 degrees.
EcSy#2671 said:
All of the above and then some.
It could also be the chip....
My truck occasionally sputters when my STG chip is on a rich setting (t1-17). If I use a lean setting T2-22 it goes away.
If you did a full tuneup and it's still sputtering, try turning down the FP a 1 or 2 psi and see if it goes away or make sure your timing is 0 degrees.
Ian Turgeon
Cascading Inspiration
Re: small sputter
Yea, theres 2 different situations here, pop and sputter at wot is very very bad and harmful. The rest of us are talking about an off idle stumble.
I've got my wide band in my new dp, I have to get it hooked up but hopefuly it will help me narrow down my problems.
Yea, theres 2 different situations here, pop and sputter at wot is very very bad and harmful. The rest of us are talking about an off idle stumble.
I've got my wide band in my new dp, I have to get it hooked up but hopefuly it will help me narrow down my problems.
TwistedTy
More boost! N.A.S.T.E
Re: small sputter
your right it is kind of a pop im talkin when im not even in any boost just cruisin very slow at 1800-2000rpm. but @ WOT it pulls great and stops the sputtering. i noticed it barely did it at all today and it was considerably cooler out compared to the last few days. that probably has nothing to do with it though. hmmmmmmm???
your right it is kind of a pop im talkin when im not even in any boost just cruisin very slow at 1800-2000rpm. but @ WOT it pulls great and stops the sputtering. i noticed it barely did it at all today and it was considerably cooler out compared to the last few days. that probably has nothing to do with it though. hmmmmmmm???
Ian Turgeon
Cascading Inspiration
Re: small sputter
I finally got the wideband installed. I noticed that when my truck is hesitating off a stop light/sign, the afr is very lean, The gauge is showing 16+ afr at when it hesitates, then as soon as it wakes up the afr is in the 14-15 range usual for cruising. I have more to learn about air fuel ratios, but at least the numbers are corresponding, and likely to be related.
I finally got the wideband installed. I noticed that when my truck is hesitating off a stop light/sign, the afr is very lean, The gauge is showing 16+ afr at when it hesitates, then as soon as it wakes up the afr is in the 14-15 range usual for cruising. I have more to learn about air fuel ratios, but at least the numbers are corresponding, and likely to be related.
Ian Turgeon
Cascading Inspiration
Re: small sputter
http://autospeed.drive.com.au/cms/article.html?&A=1595
An article about tuning afr, if you pay attention to the acceleration section, they describe tuning to the 'flat spot' and I expect this is what I'm experiencing. I think the changes to my converter/exhaust have effected the tune in this range and probably changed my fuel requirements in light acceleration.
http://autospeed.drive.com.au/cms/article.html?&A=1595
An article about tuning afr, if you pay attention to the acceleration section, they describe tuning to the 'flat spot' and I expect this is what I'm experiencing. I think the changes to my converter/exhaust have effected the tune in this range and probably changed my fuel requirements in light acceleration.