Mitsubishi: VR4 stall under full power

Ashdann,

My Australian 4G63T Starion had the same problem. It turned out to be a
hole in the diaphram of the vacuum advance on the distributor. Under turbo
boost it was forcing air/fuel mixture through the hole and into the
distributor cap. This would then explode in the cap and unsettle the timing
sensor in the distributor for a second or two (causing the huge bang/cough).
Very embarrassing when overtaking. From memory the VR4 is also a turbo with
a distributor. Replace the vacuum advance unit.

TDM

"Ashdann" <forums.yourdomain.com.au> wrote in message
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Wow! All of our 4G63 motors are distributorless ignitions. The ECU controls
advance based on airflow.
I think all of the "modern" VR4's are V6 motors aren't they?

The 4G63 VR4 cars in the U.S.A. are rare and have a cult following.


"TDM" <com> wrote in message
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He has an earlier version of the same engine. It has been around for a
while. It's like saying "my 305 yadda, yadda".

To original poster: It sounds like fuel cut. It should feel like hitting a
brick wall under full boost. What kind of boost are you running? Are you
running bigger turbos? I would check the vacuum line going to the waste gate
acuators, if you're stock.

--
Todd Honea


"simpleton" <net> wrote in message
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My Mitsubishi Cordia Turbo does the same thing. Could be the same problem as
yours so I'm interested to know if you solve the problem.


"Ashdann" <forums.yourdomain.com.au> wrote in message
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