Hi guys, I recently bought A speed three about a week and a half ago it ran great for the first week and now I’m running into some problems and the attached image are the mods that are supposedly on the car. I noticed the other day that I got a code for a lien idol when I looked at my Cobb my minimum was at 13. I was thinking that it was just because I was super low on gas trying to calculate my miles per gallon so I cleared the code and filled it up 91 octane and drove to my friends house. on the way I noticed that it would drop a little in AFR for a split second every once in a while. When in throttle. I wasn’t able to stop and go back so I got my destination and parked It. decided to throw on the retard knock sensor on my cob went for drive was sitting at 0 consistently it had gone up to 5.9 at the same time my AFR is dropped for a split second. when clutching in and letting the RPM drop I’ve noticed sometimes they raise and then fall or just take a while to fall and we’ll sit at like 1615 AFR for a second or two before falling down to 14 then on the way home I was coasting down the hill in neutral and noticed my RPMs jumping and falling and are sitting at like 700 and my AFR’s jumping up to like 17 and falling back down to 14 if anyone could help me this problem that would be amazing
Rough idol weird AFR’s
- Thread starter Longbud
- Start date
Scaytale
Gold Member
Make sure your MAF is plugged in well.
To me that sounds like a vacuum leak, and/or un-metered air.
Air entering the system after the MAF, and messing up how much fuel needs to be delivered.
seems like it is also intermittent, you might get lucky and find it by letting the car idle and listen for a leak, maybe use a hose to listen at specific spots along the intake path to the Turbo. Might be able to just wiggle your intake with the car idling, and see if the AFR goes up.
If none of that simple stuff works, try cleaning your MAF and checking your air filter, to make sure nothing is interfering with your MAF readings.
Hope that is helpful
To me that sounds like a vacuum leak, and/or un-metered air.
Air entering the system after the MAF, and messing up how much fuel needs to be delivered.
seems like it is also intermittent, you might get lucky and find it by letting the car idle and listen for a leak, maybe use a hose to listen at specific spots along the intake path to the Turbo. Might be able to just wiggle your intake with the car idling, and see if the AFR goes up.
If none of that simple stuff works, try cleaning your MAF and checking your air filter, to make sure nothing is interfering with your MAF readings.
Hope that is helpful
been looking for vacuum leaks and so far have found one tube to my boost controller that is torn. just cleaned my maff today and some of the intake piping cuz it was oily and dirty. when to put it all back on and notice that my tube from the intercooler to the throttle body is way to big in diameter and in overall size. any recommendation for a new tube and do u think that would be doing it or would I see even more problems if it was leaking from there?
i relized that last week and have sent a email to feektune with my vin to see if he has any record of my car and the parts on it hard to get into contact with the person who got it tuned been sold once or twice sense then
here is a vid i took on the way home the night it started
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Found out the intake tube from my intercooler to my throttle body is way to big any recommendation on a new one?
Thx I will check them out. Any idea the size and stuff I’m looking for?I know I need a 90 and I think 2’. Just don’t know total length or like how long he needs to be before the bend