Big hesitation between 4k-5k, what else I can change?

$pider · 04-25-2008, 06:25 AM

During acceleration at WOT or good acceleration, there is a big hesitation from 4k to 5k ... after 5k boom, it accelerate real good.

I have hard time finding what is the problem...

First I changed the spark, oxygen sensor and gas filter. All those needed to be changed o2 sensor wasn't good any more, gas filter too.

The car have multiple electric too.

What else can I verify or change? Injector, timing, maf ?? something else?

Thanks for your help

MegaSoreAss · 04-25-2008, 09:34 AM

I recently have had some trouble with "hesitation" around 3000 rpm. It turned out that the maf was defective. It would work reasonably well at other rpm ranges but ran very rich between 3000 and 3500 rpm. Changed the maf and solved the problem

$pider · 04-25-2008, 04:41 PM

I will try that, I suspected the maf too cause its painted blue and seem to come from an other car...
I will get you back with it
thanks

mercado se-r · 04-25-2008, 06:55 PM

mine has it from 2000 to 3000rmp but the air fuel guage it lean then after 3krmp it runs bettER IDID A REGRUOND FOR THE MAF IT GOT BETTER BUT IT STILL THERE
.

PwrdByUncleBens · 04-25-2008, 07:17 PM

Ive made a couple posts about having the exact same problem and I never figured it out. Its almost like hitting vtec lol except its more like vtec with the switch points all f***ed up.

mercado se-r · 04-25-2008, 10:24 PM

same here it does sound good some times

$pider · 04-26-2008, 03:32 AM

N/A or turboed???

$pider · 05-05-2008, 07:19 PM

Fixed my problem... the tps wasnt at the right position, shown 4.2 volts at WOT... I twisted the tps to get 4 V and fixed my problem, the car run fu*king good now. Damn noobie that used to work on this car before I buy it.
I never saw a car with so much problem!!!

gomba · 05-05-2008, 07:54 PM

hesitation for me was caused by my BPT valve being clogged.