The air mass sensor (ok, not a REAL air mass sensor) is the thing on the other side of the airbox. That's a sensor that eventually talks to the dpr as well. Sometimes the little potentiometer gets some worn out spots, so when the engine gets a certain amount of air, the sensor freaks out and sends a bad signal to the ECU saying there's no air (or lots of it?). Either way, that's not the problem AFAIK. :(
I was unplugging the O2 sensor at the brown/blck connector behind the throttle body, so unless the wiring problem is farther upstream, I don't think the O2 sensor is to blame. What sort of values should I see at the O2 sensor at idle, and say, 2000 RPM, after the car is warm? I'm still guessing the new chip is to blame somehow...it seems to be getting even worse...to the point that the car won't really even move. Maybe the chip didn't burn in right? On Wed, 22 Aug 2001, Anthony Pelletier wrote: > It still could be something with the 02 wireing. The > 02 is the sensor and the dpr is the actor. BTW what > is the air mass sensor? Is that on the other side of > the fuel dist that measures the air flow plate? > > > > --- Patrick Austin <[email protected]> wrote: > > Okay... > > > > a) DPR plugged in, O2 sensor disconnected: Car > > hesitates badly, won't drive. > > b) DPR pluged in, O2 sensor connected, Air Mass > > Sensor disconnected: Car > > hesitates badly, won't drive. > > c) DPR unplugged, O2 sensor plugged in, Air Mass > > sensor plugged in: Car > > doesn't hesitate, pulls to redline. > > > > So, if the O2 sensor were the culprit, I'd expect > > the car to run OK in > > scenario a). Were it the air sensor, I'd expect it > > to run OK in scenario > > b). As it is, it only runs OK in scenario c). Were > > the transfer pump bad, > > I'd expect the car to run just as badly with and > > without the DPR plugged > > in. WTF??? Could it be the TT chip I installed a > > couple of days ago? It > > ran fine just after I installed it, but maybe it's > > 'learning' a bad habit. > > The air intake boot seems fine, as do the major > > vacuum lines. > > > > At 04:34 PM 8/19/01 EDT, [email protected] wrote: > > >In a message dated 8/18/01 9:19:01 PM US Eastern > > Standard Time, > > [email protected] > > >writes: > > > > > > > > > If the > > > What > > >exactly does the DPR do, and why does it run fine > > without it hooked up? > > > > > > > > >The DPR is controlled by the o2 sensor, and it > > riches/leans the mixture > > based > > > Plug the DPR back in, and disconnect the o2 > > > Let us know what happens. > > > > > >-Dave > > >'91 Jetta GTX 16V > > >'88 Jetta GLI 16V > > >'84 Vanagon > > ************** > > Patrick Austin > > [email protected] > > (617)782-9115 > > ************** > > _____________ > > List Sponsor: http://www.netsville.com > > To remove yourself from this list, send mail to > > [email protected] with 'unsubscribe a2_16v' in > > the body of your message > > See us on the web at http://www.a2-16v.com > > Visit the 16V Homepage at http://www.gti16v.org > > > __________________________________________________ > Do You Yahoo!? > Make international calls for as low as $.04/minute with Yahoo! Messenger > http://phonecard.yahoo.com/ _____________ List Sponsor: http://www.netsville.com To remove yourself from this list, send mail to [email protected] with 'unsubscribe a2_16v' in the body of your message See us on the web at http://www.a2-16v.com Visit the 16V Homepage at http://www.gti16v.org
