scoobzie Posted October 27, 2007 Posted October 27, 2007 (edited) hi guys got a querie my car is hesitating when accelarating slowly to build up speed between 2/3 grand its worse when cold when i drive it with the lambda sensor unpluged the car is fine i have just decatted my car from turbo back ive replaced the maf sensor 3 times and the lambda sensor also cleaned the boost valve but nothing it only started doing it after the decat does anyone no if the car will need a remap and that whats causing it it a my00 2000 classic i have also replaced the lead and sparkplugs but still this problem persits its intermittent cheers scoobzie Edited October 27, 2007 by scoobzie
Double Zero Posted October 27, 2007 Posted October 27, 2007 hi guys got a querie my car is hesitating when accelarating slowly to build up speed between 2/3 grand when i drive it with the lambda sensor unpluged the car is fine i have jist deccated my car from turbo back ive replaced the maf sensor 3 times and the lambda sensor also cleaned the boost valve but nothing it only started doing it after the decat does anyone no if the car will need a remap and that whats causing it it a my00 2000 classic i have also replaced the lead and sparkplugs but stil this problem persits cheers scoobzie I'm no expert on these car's mate but i'm sure if you have replaced all the cat's including the downpipe from the turbo you will require a remap. Stevie ________ 01 WRX
cullenmin Posted October 27, 2007 Posted October 27, 2007 I ran about in my car for a few months with no cats before i got it mapped, no problems at all!
jae Posted October 28, 2007 Posted October 28, 2007 what sort of air filter are you running? mine (99my classic) does this mostly when cold, and gentle throttle is worse, but is there all the time. as you've already done the usual suspects, MAF and Lambda, I would like to know too. I just put it down to a.... feature... quirk.... hope you find the answer soon. nothing worse than a niggle.
thefastone Posted October 28, 2007 Posted October 28, 2007 You know Ive just noticed my car doing this, just after I had it serviced... and I'm getting exactly the same thing as you are describing, although ive not had any mods done on the power at all yet... not saying that it wasn't doing it before, but ive only just noticed it really... again worse when its cold...
scoobzie Posted October 28, 2007 Author Posted October 28, 2007 You know Ive just noticed my car doing this, just after I had it serviced... and I'm getting exactly the same thing as you are describing, although ive not had any mods done on the power at all yet...not saying that it wasn't doing it before, but ive only just noticed it really... again worse when its cold... well m8 only 2 things maybe the cause of your problem after your service the gap on the sparkplugs is wrong or who ever done your oil change never filled the new oil filter before putting it on and turning the engine over before starting it thats a few main reasons for the hesitation regards scoobzie
ScoobyBB Posted October 29, 2007 Posted October 29, 2007 (edited) Why would not filling the oil filter before fitting to car cause hesitation? Edited October 29, 2007 by ScoobyBB
ormiboy Posted October 30, 2007 Posted October 30, 2007 Difficult to say if running around with a decat will be bad or not. After my decat and before my remap i was advised by a Andy to take it easy till my remap. Id stay on the safe side and get it on the rolling road to see what the fueling is up to. some cars id think would be leaner than others. Stay safe! Cheers Willie
scoobzie Posted October 30, 2007 Author Posted October 30, 2007 hi guys was out in the car today as soon as the rain came on the cars hesitation got worse it seems the weather is making it worse any ideas as this is getting costly now i ended up disconcting the lambda sensor to drive home as the hesitation was driving me nuts its intermittent it always hesitated between 2/3 grand but today it was right up until i changed from 3rd to 4th cheers scoobzie
thewelsho Posted October 30, 2007 Posted October 30, 2007 (edited) hi guys got a querie my car is hesitating when accelarating slowly to build up speed between 2/3 grand its worse when cold when i drive it with the lambda sensor unpluged the car is fine i have just decatted my car from turbo back ive replaced the maf sensor 3 times and the lambda sensor also cleaned the boost valve but nothing it only started doing it after the decat does anyone no if the car will need a remap and that whats causing it it a my00 2000 classic i have also replaced the lead and sparkplugs but still this problem persits its intermittent cheers scoobzie I am by no means the man to talk to when it comes to troubleshooting car issues, however, the implications in your post seem to narrow it down to one of two things: the lambda sensor and the decat. If you disconnect the sensor you are effectively by-passing the systems ability to monitor exhaust gases, hence the reason the car runs ok without it. Therefore, it would then seem that there is an fuel mixture problem, so what could be causing that? Well, you decatted the thing didn't you, and that changes the exhaust gases and the problem started after you decatted. It seems to me that must be the decat! Or is that too simple. Put your cat back on, reconnect the lambda sensor and if it goes ok, you know 100% that its the decat. Edited October 30, 2007 by TheWelsho
scoobymark Posted October 30, 2007 Posted October 30, 2007 jamie, you have 2 choices m8 1. get shot of the car: problem gone 2. take it to hypertech hand keys to duncan and tell him to fix it: problem solved
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