QuestionRoland,
The Voyager was doing operating with not a sign of a problem and then Tuesday it was driven into town and parked. When my wife tried to start it, it just turned over but no firing.
I checked the fuel pump and it works, with fuel getting to the fuel injectors. There is a spark on the plugs (at least the ones I checked).
Then I tried to start it again and got it to fire a couple of times and then just back to turning over. Tried again later and it started up but was extremely rough and died on idle and would go back to not firing.
Every where I checked, it was recommended that I check the EGR valve and so I looked for it but could not find it. I even check through most of my Chrysler '91 Voyager repair manual and it only referred to the location of the EGR on the 2.5 engine. Others said it was behind and slightly below the throttle body but nothing is there.
Does the EGR valve exist on this model? I would appreciate any suggestions.
Thanks,
Allan
AnswerHi again,
I thought that you might have tried for codes. There aren't too many other things that cause a no start and that aren't monitored by the engine controller. However, I would have two candidates: an crankshaft position sensor that is just beginning to breakdown such that it hasn't passed the threshold to set a code and a manifold absolute pressure sensor that similarly is off-value but not so much as to set a code. You could check the crankshaft sensor by probing the wires with vary fine pins. The orange wire should have 8 volts on it when the ignition is "on" and if you measure the voltage between the other two wires while you turn over the engine by hand using a ratchet on the crank pulley bolt you should see the voltage oscillate between 5.0 and 0.3V three times for each revolution.
You might also check the resistance of the primary side of the coil between the 12V input pin and each of the other three pins (should be 0.45-0.65), and the resistance between the paired coil towers should be 8 to 15k ohms.
The MAP is a little tricky to measure that it is off balance but see what its signal voltage is when it it just measuring the ambient; it should be around 4.6V, and then drop when you start cranking it (measure between the dark green/red and black/light blue wires), but the level is uncertain to me when cranking. If it is idling is might be in the range of 2V.
So without an egr it is a little more challenging.
Roland
PS Thanks for the positive evaluation and nomination.
Hi Allan
While I would agree that the egr is a suspect, my '91 FWD car shop manual shows that only the CA-sold vehicles with the 3.3L had an egr. So if the van was no different than the passenger cars I suspect you don't have one. If it were there you would find a pipe attached to the exhaust manifold on the firewall-side manifold that came around the driver's corner of the engine, with egr valve mounted horizontally in that pipe which ultimately enters the intake manifold near the throttle body. The round solenoid to operate the valve is mounted near the top of the throttle body. So I don't think you can miss it.
I would suggest that you try for a readout of the engine controller for fault codes. Use the ignition key: "On-off-on-off-on and leave it on" doing that in 5 seconds or less elapsed time. The watch the 'check engine' light which remains 'on' to begin to flash, pause, flash, pause, etc. Count the number of flashes before each pause. Then repeat to verify the numbers are accurate. Then group them in pairs in the order they read out to form the two digit fault codes. The number 55 is always the last, meaning "end of readout". Then either write back with the results for advice and details or go the www.allpar.com/fix/codes.html for a code translation.
It may be that one of the sensors has gone bad and the readout may tell us which one.
Roland
