Hi Doug,
see others have posted also. I had this problem - or a similar one - just
a few weeks back, Goldie would start, run rough, copious black smoke, and
eventually settle down quite nicely. I found mine to be a faulty /leaking
injector. I was in the process of a fuel pressure check, had to go inside
for a computer issue, and when I came back a half hour or so later, F/p had
dropped to around 10lbs. I don’t like pulling injectors, so I started with
the easy one first - the cold start injector - and hit the jackpot. Mine
was leaking a good sized drop every couple of seconds. I pulled it out, put
in a known bad one (no leaking, no working) and then did the techron
/acetone/compressed air clean of the failing one. after 2-3 days, it’d hold
40lbs of compressed air, so it was clean, put it back in, and I was in
business. This is the 2nd one in 10 years on various jags that failed like
this, so it might be a candidate for you to look at. The good ol’ Sonoran
desert is quite hot, even when “cool” and I don’t think the CSI ever got
much of a workout in the summer, and some sediment /crap /whatever, just sat
in the CSI unit and hose, and eventually began leaking. Might be worth a
check.
Ken
Maricopa, Sonoran Desert, AZ
87 SIII VdP
135,000 miles,
Pace… Space… Grace…> In the last few days, my car has begun to run really rich
and rough at start. Starts instantly as usual, but misses
badly with black exhaust (rich mix I presume) when revved,
then when warmed up runs smoothly. Takes about 5-10 minutes
about the time for temp gauge to read 60C-70C or so.
I have looked at all the usual suspects, plug wires, AFM
connection etc. Suspect whatever gives feedback to ECU
regarding temp and mixture which is what?? Coolant Temp
Sensor? Cold Start Injector?? Any help appreciated.
Doug Grace
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