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Car Forum / Chrysler Cars / September 20063.3L V6 Engine Issues
The engine in my '92 Grand Caravan LE AWD will not start. Yesteday i changed the thermostat and its now having this problem. Before changing the thermostat it ran perfectly. This is what ive worked out: - ECU does not report any engine failure codes (only 12 & 55), but the engine also has not ran since the ECU was last reset (so explains the lack of error codes?). - The injector relay does turn on, but injectors are not firing on cranking - There is no spark on cranking - Fuel pump appears to be working So i guess this points to a cam (does it have a cam sensor?) or crank sensor issue? I gather the ECU is ok as i do get the 12 and 55 fault codes, and the fuel pump does turn on. Can anyone tell me exactly where to find the cam and crank sensors? I know the crank sensor is meant to be located somewhere around the top of the bellhousing where it meets the block, but for the life of me, i cant find it (maybe hidden by the exst manifold??). Thanks! > The engine in my '92 Grand Caravan LE AWD will not start. > Yesteday i changed the thermostat and its now having this problem. [quoted text clipped - 20 lines] > > Thanks! The cam sensor connector is attached to the Alternator mount bracket next to the side motor mount, it is near the thermostat you just replaced, see if you knocked the connector loose Glenn Beasley Chrysler Tech Thanks, i found the cam sensor. Im guessing this is the problem as the cables would have been moved around when i was changing the thermostat. I have checked the wires for breaks on the loom side of the sensor connector. Is there an easy way to test the cam angle sensor itself? I assume it needs a 5V supply, ground, and then the last wire is a signal out. Thanks. > The engine in my '92 Grand Caravan LE AWD will not start. > Yesteday i changed the thermostat and its now having this problem. > Before changing the thermostat it ran perfectly. this is the problem, if it ran fine why mess with it? Oh, everything was running fine, besides a overheating issue which pointed to a bad thermostat. Hence why it was replaced. >>The engine in my '92 Grand Caravan LE AWD will not start. >>Yesteday i changed the thermostat and its now having this problem. >>Before changing the thermostat it ran perfectly. > > this is the problem, if it ran fine why mess with it? Well that's real helpful! Bill Putney (To reply by e-mail, replace the last letter of the alphabet in my address with the letter 'x') Mark Williams wrote: > The engine in my '92 Grand Caravan LE AWD will not start. > Yesteday i changed the thermostat and its now having this problem. > Before changing the thermostat it ran perfectly. So the question to ask yourself, is what did you mess up while changing the thermostat? Did you unhook any wires or vacuum hoses to gain better access? Knock something off with a wrench while changing the thermostate? Think through you procedure and see if you can remember unhooking something, slipping with a wrench, etc. It is fairly unlikely that your engine just coincidentally failed when you changed the thermostat. Possible, yes, but not probable. Probability favors something that happened related to the thermostat replacement. Matt > The engine in my '92 Grand Caravan LE AWD will not start. > Yesteday i changed the thermostat and its now having this problem. [quoted text clipped - 20 lines] > > Thanks! Mark make sure you plugged the coil pack in all the way, I believe you removed that to access the thermostat Glenn Beasley Chrysler Tech Well i now have it running intermittently. About 50% of the time itll start. When it does start sometimes itll run perfectly, other times itll splutter at idle and wont rev very well. A few times when it has been idling smoothly itll just stop dead... no splutter and then die, itll just stop completeley. Engine codes are always 12, 55... so its not finding anything wrong. I guess cam and crank sensors would be the main suspects? The cam sensor looks ok, i still havnt been able to find the crank sensor. Thanks for the continuing help! > Well i now have it running intermittently. > [quoted text clipped - 10 lines] > The cam sensor looks ok, i still havnt been able to find the crank > sensor. Those two sensors is what I would suspect. Here's a pic of where the crank sensor is: http://freebsd-corp-net-guide.com/94tcpics/fig50.jpg Here's the entire project that documents this: http://freebsd-corp-net-guide.com/94tcpics/project.html Ted The cam sensor is located just below the t/stat housing. disconnect the plug and dry it out. if that doen't fix replace the cam sensor. look right above the water pump just to the left of center as you are looking at the engine. good luck >The engine in my '92 Grand Caravan LE AWD will not start. >Yesteday i changed the thermostat and its now having this problem. [quoted text clipped - 20 lines] > >Thanks! |
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