Martindup

Hi guys,

I'm new here and hoping to find some help,

If I WOT from first to fifth, everything is perfect. When i'm going 60 to 80 and floor it, I will get a cutoff around 4000rpm-5000rpm (no matter the gear)? However if I slowly accelate all is A1?

I have a 86 944Turbo, gutted Cats, no exhaust, a resurfaced head and a chip. I have had this problem since I had the engine rebuilt.

Martin Dupras

JustinL

I would suggest investigating your throttle position sensor. I had a similar problem in the N/A and the TPS was the culprit.

Martindup

thats always happen on the highway and after the cutoff if I brake to zero the engine stall, I need to restart and everythings ok

Danno

What boost-level are you running? Sounds like it could be overboost-protection kicking in. Also what is this "and a chip." that you have?

Martindup

the person who sold me the car told me stage II
and with my gauge I run 14-15psi, and when the cutoff ,the gauge drop to zero .maybe a vacuum or air/ratio I don t no.I buy the car last summer and had some trouble with main crank bearing so I remove and rebuilt the engine and the shop who put it back don t find the probleme.let me know i you have some answer.Thanks

Olli Snellman

I suppose Danno is right. Most likely overboost protection kicks in. What chips do you have ?? Sounds like they have overboost function like the original ones.

ian kam

well i had some trouble with my stage two chips engine never full cut out but felt like it was searching for power at 4000 rpm replace chips with original and presto power returned and now no backfire in deceleration at 4000rpm . Sending the chips back for testing and replacement.

Martindup

but why the "chip" fail exacly after the shop put back the engine

Martindup

look like he forgot to do something

Martindup

by the way guys Im sorry I don t speak & write really good in english

951Porschiste

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Martindup:
<strong>but why the "chip" fail exacly after the shop put back the engine</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Martin,

Qui a fait la reconstruction du moteur?

Andre

Martindup

europeen motor work il s appelle "hassan" sur boul jean talon montreal

Martindup

he was suppose to port the intake so i don t if he adjust air /flow

951Porschiste

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Martindup:
<strong>europeen motor work il s appelle "hassan" sur boul jean talon montreal</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Si tu n'as pas de réponses satisfaisantes chez european motor work, obtient un deuxième avis. J'ai fait affaire avec George chez GTA Auto Performance à St-Hubert(450) 443-4500. Il a été très honnête avec moi sur la condition réelle de ma voiture. Mais je n'ai pas encore vu la qualité de son travail.

Bonne chance!

Danno

"by the way guys Im sorry I don t speak & write really good in english"

D'accord, il ne faut pas parler en anglais tout le temps. Et je tu comprend exactement.

"he was suppose to port the intake so i don t if he adjust air /flow"

I hope he did not try to get more performance by adjusting the AFM-air flow meter. There is no benefit to messing with it. There were a couple of people who had recent problems that appeared to be chip-related, but turned out to be adjustments in the AFM or a bad TPS-throttle position sensor.