After swapping the cap/rotor, plugs, plug wires, and stil having a misfire I finally plugged the laptop into the megasquirt. I should have done that weeks ago. Found the intake air temp was -40 and didn't budge. A trace was corroded completely the circuit board in the engine compartment (not the main efi unit which is in the car) that sends 5v to the intake air temp sensor. I patched the circuit board and regained the proper intake air temp reading and no more misfire. The efi was making the car run nearly 40% richer with the -40 degrees air temp.
Rock Auto refunded the cap/rotor cost and also provided free shipping on the bosch cap/rotor I ordered to replace them. Hope it wasn't my distributor with too much slack in the shaft that was the cause of the rotor contacting the cap. On Mon, Aug 18, 2014 at 7:46 PM, Steven Arguello <[email protected]> wrote: > A few years ago, I followed the numbers on a new cap after swapping heads > and it almost started, backfiring really bad like the timing was way off. I > checked and re-checked everything for a week until I realized that the > numbers on the cap were reversed. I assumed that the 8v and 16v caps were > the same, just different rotation. > Anyway, yesterday, I took off my cap, looked fine, I sanded the center of > the rotor a bit and put everything back together, now it runs worse. All of > a sudden it's running way too rich. > I'll look into it when I have more time. > > On Aug 16, 2014, at 1:14 PM, Jack Simon <[email protected]> wrote: > > There is your problem!! NEVER, EVER trust non OEM. Here are the ones you > will need providing yours is a 2 liter. These images were from > AutohausAZ. (http://www.autohausaz.com/).......Jack > > > Makes > 1991 VW > JETTA GLI 16-VALVE > Ignition Parts > > Distributor Cap > > > 03368 > Bosch OEM - Distributor Cap > 1 per car. > $10.32 > SALE$10.75 > List: $49.00 > Qty: > > > > > Makes > 1991 VW > JETTA GLI 16-VALVE > Ignition Parts > > Distributor Rotor > > > 04170 > Bosch OEM - Distributor Rotor; 10mm Shaft > For distributors with 10mm shaft. 1 per car. > $5.19 > SALE$5.41 > List: $26.50 > Qty: > > > > On 16 Aug 2014, at 12:32, Chad Rebuck wrote: > > I got some off brand from rock auto called auto tune > because they were on clearance... I put the old cap and rotor back on for > now. > > _______________________________________________ > a2-16v-list mailing list > [email protected] > http://mail.a2-16v.com/mailman/listinfo/a2-16v-list > For list archives, see listinfo link above. > _______________________________________________ > a2-16v-list mailing list > [email protected] > http://mail.a2-16v.com/mailman/listinfo/a2-16v-list > For list archives, see listinfo link above. > _______________________________________________ a2-16v-list mailing list [email protected] http://mail.a2-16v.com/mailman/listinfo/a2-16v-list For list archives, see listinfo link above.
