ok, this bucking is getting really irratating and makes for an uncomfortable ride. it bucks at really light throttle or when i let off the gas and coast. today, when i was coming to a stop, the car died. car idles just fine. its the first time so far. ANY ideas? i changed the plugs thinking i fouled them but car still runs the same. could it be EGR? oh ya, i noticed on the plugs i pulled the center was white. maybe thats normal? i have never gone WOT yet cuz i have to get a dyno first. the car absolutely SUCKS up has now... guess ill have to get used to that
trying to pintpoint a problem after s/c installation
- Thread starter predator_96817
- Start date
do you have a chip in the car? i think the white plugs mean it's running lean. make sure all your hose connections are tight.
crew_dawg16
New Member
If you haven't had the car dyno tuned yet, then that is the cause of the problem you are having. You have to get that thing on a dyno ASAP. You are going to cause damage to your engine if you drive it like that.
I had the same thing happen to me when I got my supercharger put on. You need a dyno tune. I got a chip with my supercharger and it didn't cure my bucking, come to find out my mass air meter was still for stock injectors and I had 30lb injectors put on with the blower. So I found a mass air meter on ebay that was calibrated for 30lb injectors that came from another supercharged mustang same year as my car and it cured the bucking. I bet thats your problem.
jstreet0204
Active Member
wht99gtconv said:
Stock MAF doesn't need to changed. I run mine with 30's. The inector size should be taken care of on the chip.
On another note, one thing the original poster may want to check into is having the fuel_cuttoff_on_decel shut off. It made mine much smoother when I let off the gas.
here was my dyno....kinda rich huh? we also tried running the car at part throttle and the a/f was consistantly in the 11's. maybe the whiteness on the plugs was just on the old spark plugs i changed out. i have yet to check the new ones. but he old ones were in when i had the supercharger on so it dont make sense...
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cobra killer
Founding Member
Plugs will run white under normal driving.It has nothing to do with WOT.
A/F is to rich,the bucking is from just that,the car is to rich overall.You need to check all hose connections before the tune is adjusted.It shouldn't be rich under normal driving.If there is a leak after the maf of any kind the car will run rich.
A/F is to rich,the bucking is from just that,the car is to rich overall.You need to check all hose connections before the tune is adjusted.It shouldn't be rich under normal driving.If there is a leak after the maf of any kind the car will run rich.
cobra killer said:
suscribe. BTW the above poster is right. no input needed from me since the above poster is the guy you need to talk too.
jstreet0204
Active Member
cobra killer said:
Just curious, but why rich. I would think that unmetered air after the MAF would cause a lean condition. I realize you have seen a lot more of these situations than most of us so I am curious as to what causes it to go the other way...
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