95 Avenger EGR system problem HELP!

Tiny
GPHPILOT
  • MEMBER
  • 1995 ALL OTHER MAKES ALL OTHER MODELS
"Hi, I have a problem with my mothers car, 95 Avenger 2.5 ES, 90,000 mi, the car
surges/misses upon acceleration around 40mph, I replaced the EGR valve &
solenoid (already changed plugs, cap, distributor, wires Fuel filter) The car
had problems when I got it.
The car still has the same problem after I changed the egr valve & solenoid, I
visually checked the operation on the egr valve on the car (I have the Factory
Service Manual)and off, but when the car reaches the 3,000 rpm, the valve does
not open fully (as it does during the vacuum check)it has approx 1/4 of movement
& it jumps back & forth from close- opening 1/4 inch. I checked the vacuum going
in to the solenoid, no problem, but coming out from the solenoid to the egr, it
is very little & is unchanged even at 3,000 rpm. So I the then checked the
voltage to the solenoid & it jumps all over & I cannot get a stable reading at
any rpm, it jumps so much you cannot read it.
HELP! Is the PCM defective? I know it is supposed to control the voltage to the
solenoid, I unplugged the PCM & inspected the pins, then re-connectd the plugs,
still the same.
Thanks for all the help you can give me,
Cliff"
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Tuesday, December 5th, 2006 AT 5:43 AM

3 Replies

Tiny
CARUNDELL
  • MEMBER
Hey cliff,
It doesn't sound, to me, like an egr issue, and as far as testing the egr solenoid w/ a DVOM its next to impossible as its controlled by the pcm on a "duty cycle" stratagy, meaning the pcm "pulses" the ground side of the solenoid to effectively open the egr under engine load conditions.

You mentioned the replacement of ignition parts, but did you set the timing to spec? To your knowledge was the timing belt changed and possibly not installed correctly? Those are some easy and quick things to check to rule out the igntion and timing as a cause of the problem! Let me know, I've got a few more thoughts

Regards,

Chris
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Tuesday, December 5th, 2006 AT 4:09 PM
Tiny
GPHPILOT
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Hi, thanks for your help, I replaced the timing belt myself, approx 1 year ago (waterpump froze) It was running fine till a few months ago, the problem would come & go, now its all the time, before I changed the EGR, I fully tested it, it seem to have been stuck, then test drove the car again & was fine for a couple of days, then the problem came back, so I then changed out the EGR & solenoid but the problem remained, but when I checked the movement of the old valve on the car @ 1000,2000, & 3000 rpm, the movement was more than than the new EGR & solenoid, the new valve movement is jumping wildly & only approx 1/4 movement.

Thanks again
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Tuesday, December 5th, 2006 AT 9:02 PM
Tiny
CARUNDELL
  • MEMBER
Cliff,
Ok, lets rule out(or in) the egr then. Simply disconnect the vacuum @ the egr and plug the vacuum line w/ a golf tee or small bolt/screw, then drive the vehicle and if the problem persists then the egr is pretty much out the window as to the cause, if in fact the issue goes away then the solenoid, egr or vacuum breaker may be in question.
Additionally, did you put a timing light on it and verify the timing? Remember, when you set the timing on that motor, the coolant temp sensor[u:f6a9b410e6] must[/u:f6a9b410e6] be disconnected to set the "base timing", the Check engine light will come on and the cooling fan will run during this time and you'll need to clear out the code when done. The timing spec should be on your under hood emissions sticker. Pm me if ya need more!

Regards,

Chris
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Wednesday, December 6th, 2006 AT 4:22 AM

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