[T3] Mystery Miss

[Keith Park]

dirty trigger contacts?
if the head temp sensor is going open intermittanly it will cut out,
but usually for more than a quick buck.

Keith


Topnotch Restorations
topnotch at nycap.rr.com
http://www.a383ina68.addr.com/radiorest/main.htm
71 Squareback  "Hothe"
65 Notchback  "El Baja Rojo"
93 RX7  "Redstur"
87 Golf  "Winterat"
 
-----Original Message-----
From: type3-vwtype3.org [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org]
On Behalf Of Daniel Nohejl
Sent: Friday, May 06, 2016 9:27 AM
To: type3 at vwtype3.org
Subject: [T3] Mystery Miss

So over the last week, we've developed a miss under a variety of conditions.


A little bit of background:

-Last summer, we'd get a miss after a few hours of driving on hot days. It'd
happen a few times and then the car would die on the side of the road. 

-After changing a bunch of FI components, it went away. I'm still not 1000%
sure which one fixed the issue but since the first week of September, the
car hasn't died on the side of the road.

-In October, we were driving at about 50 up a slight hill and the car
missed/bucked violently 4 times in a row. A minute or so later it happened
again. After that, we were buck/miss free from October until Thursday of
last week. 

-The only exception is that on cold and cool mornings, the car bucks like
crazy at part throttle after start up. I can always accelerate through it
though.

On Thursday of last week, we were cruising at 70 on a flat section of
highway 2.5 hours into a 6 hour drive when out of nowhere there was a sudden
miss/buck. It only happened once and not again until yesterday.

In the morning, I was accelerating up a hill in 3rd and when I got to b/w 45
and 50, the motor bucked/missed once. It didn't happen again for the rest of
the ride or at all on my trip home.

This morning, driving up the same hill as yesterday, I got to the same speed
in the same gear and it missed 3 times. I was able to accelerate though it
though. Then, about 30 seconds later, cruising on flat road in 4th at around
52, it missed a few more times and I was able to accelerate through it. For
the rest of the trip, everything was fine until the last 200 yards or so. I
was accelerating quickly through an intersection in 2nd gear and it gently
missed/bucked 3 times. 

FWIW, yesterday was grey, cool, and humid and today it's pouring out. 

I suspect I'm looking at an ignition system issue, but I also wanted to see
if these symptoms rang any particular bells for anyone. 








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