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
