[200q20v] Slow cold starting
brett at pdikeman.ne.mediaone.net
Tue Dec 12 20:53:37 EST 2000
At 10:44 AM -0500 12/12/00, Richard E. Berlin, Jr. wrote:
>Here's the newest problem:
>My mechanic and I have run every possible test, and replaced every
>suspicious part prior to my "chipping" the ECU. One problem remains.
>When cold, the engine cranks for several seconds before firing, and when it
>does, I notice some bluish smoke for a few seconds in the exhaust.
My car just started doing this as wel(it is chipped.) It's
infrequent, but I suspect that at 150k miles and with the chip, it's
time for a reman turbo, possibly not, see below. The question
is...does one go larger turbo? I really don't want to sacrifice
spool-up time, but if it does come down to paying for replacing the
turbo(ie, checks like play in the shaft reveal too much play and
stuff), it's something to consider. Looking for comments on this.
Anyway, back to the issue.
> At present, I have run two treatments of Lubro Moly valve and
>but this doesn't seem to help. Have any of you dealt with this problem?
>Should I try replacing the injectors, (90K miles), or do you think I should
>suspect something in the PCV area?
>Suffice it to say, the car has new ignition wires, rotor, plugs and starter
>motor. Because of the blue smoke I wonder if oil is leaking somewhere.
possibly. You might be on the right track with the injectors. It's
not impossible to verify; you can pull the injectors, reconnect them
to the rail and put the business ends into containers. Repressurize
the fuel system by running the pump somehow, seal up the containers
so gas doesn't evaporate, and come back after a while. If you end up
with gas in the bottom of the containers...bingo. That may not solve
the smoking...you may have both a bad seal on the turbo -and- bad
injectors(wouldn't that be fun :-)
oh, another option is simply taking the injectors to a overhaul shop.
I've heard prices that make a complete overhaul cheaper than 1-2 new
injectors. Car is obviously out of commission, but you might find a
place within driving distance; the shop to boot might be equipped
with a professional fuel system/intake tract cleaning system(like
>Thanks in advance for your input. BTW, as I am about to Hoppenize the engine
Sort out this first. I'm sure your mechanic has said something to
this effect :-)
>, should I consider replacing the injectors with non OEM ones??
Higher fuel flow injectors(if that's what you mean) require remapping
the ECU, because the ECU doesn't realize that the same pulse
dispenses more fuel; it can compensate ever so slightly for
variations as the injectors age, but not that much. Typically, an
RS2-like turbo, injectors, and ECU tuned specifically for both are
sold as a set. Can't really mix and match higher HP components(I
doubt there is a chip "just" for injectors.)
Also, if you haven't heard, make sure you include a better exhaust
manifold if you plan on going past "just a chip"(pretty much the
limit without a manifold, or you start burning valves because of
cooling problems with #1&5 cylinders according to popular wisdom.)
Brett Dikeman Systems Engineer
ProAct Technologies Corporation 914-872-8043
(formerly CFN[formerly iClick, Inc]) 914-872-8100(fax)
120 Bloomingdale Rd. http://www.proacttechnologies.com
White Plains, NY 10605
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