Re: ECU/ PCM engine computer for '95 Chrysler Town & Country van
- From: philthy <dbrider@xxxxxxx>
- Date: Sun, 14 May 2006 18:04:49 -0400
try autozone and carquest both sell them and have better warranties than mopar
and progammers are now hitting the market for the mom and pop shops to reflash
them
maxpower wrote:
--
Glenn Beasley
Chrysler Tech
"TX_Biker_Pup" <tx_biker_pup@xxxxxxxxx> wrote in message
news:1147585468.813770.240410@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Does anyone know a good source of PCM (Powertrain Control Module)
engine control comptures for the '95 Chrysler Town & Country vans???
I lent my van to someone that left the lights on, jumpstarted the van,
and left it running in a hard rain to charge the battery and now it
will not run. When I got to it the engine compartment was totally
soaked, water poured off the inside of the hood when I lifted it, and
the belts-side of the engine had seen a lot of water along with the PWM
computer.
Removing the cover of the PWM showed it to be dry with good potting on
the computer circuit board and the module connector was clean and dry
as well.
The engine with start and run for a few seconds after letting it sit
for several days but floods out with fuel-wet plugs and will not start
after the intial or second attempt.
At first thoguht I considered the possibility of having a clogged
catalytic converter due to loss of firing of one or more cylinders due
to wet wires due to engine having been run in the hard rain. I removed
the oxygen sensor to relieve possible back presure but that had no
effect and did not allow the engine to run any better.
Using a 4 channel oscilloscope it looks like the problem is the PCM
engine control computer. Cam and crank position sensors seem to be
working... need to stull check the TPS and MAP sensors for appropriate
range.... no troubel codes at all are being reported from the PCM test
mode using he ingnition switch cycling proceedure to get codes pulesed
out from the Check Engine lamp on the dash.
When using the 4 channel scope it showed missed fuel injector pulses,
and pulsed of extreem duration that would be attributed to severe
engine flooding indicated by the very fuel wet spark plugs.
It it looking like the PWM engine computer is not operating properly
and i would liek to know if anyone has SUCESS in resolving a similar
problem to this... My thoughts to proceed are
1) check PWM 12V supply for integrity using a multimeter to see steady
12v supply at PWM connector while observing PWM malfunctions.
2) inspect and clean battery terminals just to be sure as cables have
been removed many times for battery charging with lots of cranking in
between... batter is in good condition and holding an adequate charge
thru this but terminal connections were not closely inspected for heat
scoring.
3) replace the $%&^#()$ PWM module... $800 from dealer... $200 from
junk yards... and I think I saw a printed wireing board only that was
"tested" byt some outfit on the web a few weeks ago which I can not
seem to be able to Google anymore. This apparently did not have the
environmental potting compund or housing.. or possibly just lacked the
housing... not certain.
QUESTONS BEING ASKED HERE:
1) Has anyone RESOLVED a similar situation with severly wetted PCM
engine control computer, sensors, and connectors and have some specific
suggestions beyond what is in the factory manual troubleshooting
section?
2) Has anyone any experince pro or con with suppliers of reconditioned
PWM modules?
i.e. is there any need for recalibration of the crank and cam position
sensors as there is in some of the GM applications when sensors are
replaced? Is there a well known source for supplying reliable
reconditioned units or salvage ones? etc. Discussion of swapping of
PWM modules, versions of software for them, knowing when you have one
for your model year vehicle, etc are welcomed...
Please reply to the list here but also CC me directly to
TX_Biker_Pup@xxxxxxxxx
if you can help.
Thanks much in advance!
If it is the PCM replace it with a MOPAR reman part because at least it
comes with a 12/12 warranty. I will tell you this right now but cannot speak
for all remans. The company that Chrysler uses to "recondition" there
modules do not properly test them. Out of 5 that I have used 3 had problems
with them. All they do is clean em up and ship them back out hoping most are
still good. And the fact that we cant get new ones on most older vehicles we
are stuck with this company. A very big inconvenience to our customers and
for Chrysler to allow this company to keep putting Mopar Remanufactured on
the Box has a lot to be said.
My opinion
Glenn Beasley
Chrysler Tech
.
- References:
- ECU/ PCM engine computer for '95 Chrysler Town & Country van
- From: TX_Biker_Pup
- Re: ECU/ PCM engine computer for '95 Chrysler Town & Country van
- From: maxpower
- ECU/ PCM engine computer for '95 Chrysler Town & Country van
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