Hi! I have a 1991 Subaru Van MPFI Supercharger, that I have just bought about a month ago. Ive driven it around town and one long trip and had just one problem. It will not sit and idle for long, if you start it let it sit it will stop after about 5 min. If you start it and drive it it will run okay until you come to a light some times it will be okay sometimes it will stall. In most cases when it stalls it wont start up again until it sits for 15 min. Ive checked it and have found that it is the spark that Quits and not a fuel problem. It has an Electronic ignition. could it be the coil? Why doesnt it quit at high speed, just at idle. you guys are great I know you can help!
could be a problem with one or more of the plug wires,cap,rotor,or plugs themselves..revving makes it seem smoother because it's firing more often...idle air bypass could be clogged or inoperative..vacuum leak possible
It either the coil as mentioned above or the pickup module in the distributor. Here is the English parts catalog for Subaru EN07 engines including Supercharged. Also great for you guys with the rare LPG engines. http://www.lulu.com/product/paperback/subaru-sambar-en07-engine-series-english-parts-catalog/5626971 Cheers, Don
To add info to my post. I am sure that it is an electrical problem because I can reproduce it every time at will. I just start it up and let it idle and after 5 min it will stall BUT will not start again until it sits for 15 min. The I'm sure its electrical comes from the fact that when I'm doing this stall test, Ive hooked up an old strobe timing light that works off the spark only, and after it stalls the spark is gone as shown by the strobe. On tuesday I will be changing the cap and wires the plugs look great. Im not sure about where to get a coil or pickup. Thanks for the info on the parts book, that will be a big help. John
Due to the high RPM's these engine spin at coils go bad on average 80,000 to 120,000 kilometers. Pickup units get extremly hot in Subaru's due to the lack of air cooling in the rear engine compartment. Yes, I would change the coil out first but nothing worse than finding out thats not the only problem and then having to wait on ordering more parts. Heat takes it toll on electronics. We have the coils used for $65 and distributors rebuilt for supercharged engines at $135. Cheers, Don
Go to your local auto junk yard and pay the 5-10 bucks they would want for a used coil and give it a try. Is your coil a 2 wire?> if so most coils from all cars will work on yours.
Thats just what I did, I got an old coil from the local yard, hooked it up and POOF the stalling problem is gone. Just in time cause winter is gonna come any day now and I need my Subaru for work. Thanks! everyone for all your help, it was much appreciated. Johnwscooking
same symptom as mine the only difference is that i have my engine light come on. took us awhile to diagnose the camshaft sensor problem. when the sensor gets hot... it sends the wrong signal to the PCM/ECU making the engine out of timing, thus shutting it off.
Okay bro help me now my problem is a Lil tricky, I have done my engine afterwards I tested everything compression, spark, fuel all z well. Now it's flicking the engine check light and if u Crack t it starts and it shutsdown immediately. Is it the crank sensor or there is another problem
I am having difficulty understanding what you are trying to say. What exactly does "I have done my engine" mean?
I don't think its a cam sensor, its the ignition pickup module and basically it takes the magnetic pickup signal from the spinning rotor and turns that into a waveform that the ECU understands to fire the coil. They typically have a failure mode which happens when they get hot. So it will run then shutdown once you get the engine good and hot. Very annoying. I had it happen on my other JDM car before.
The distributor is directly connected to the end of the cam on the Sambar. The tone wheel may be on the shaft inside the distributor, but it directly relates to the position of the cam.
Are you certain that the timing belt was reinstalled correctly? Or the order of the spark plug wires? You also mentioned a flashing CEL, which generally means that the test mode connectors under the dash are connected to each other, which they should not be in normal operation. It is either a set of green and set of black connectors, or two sets of green connectors, depending on year. They are behind/under the fusebox under the dash. They each have only 1 wire, and neither one should be connected in normal operation.
Learn something everyday. Just looked at your parts listing and saw it. Didn't realize the supercharged difference.
Timing belt is fine, I don't know about the firing order. What's the correct order? Also what's shocking me is that if u put fuel in the manifold it starts perfectly then as soon as the fuel runout it stops
