1994 Caravan 3.3, starts and dies
Hi Everyone, new to the site, was referred by someone on my usual forums site. I've got a problem with my Grand Caravan. I just received it from the previous owners who gave up on attempting to find it's problem. Here's the specifics 1994, 3.3, 150,000, with fresh plugs, wires, coil pack runs an Intrepid, crank sensor is still magnetic and cleaned (but I don't know how to check it correctly), compression is 150 across the board, fuel pressure is 50 cranking and running (if you can call it running), air filter is new. Now the bad. Van cranks and fires right up, but immediately dies (within a second or 2). If you pump the accelerator it'll keep running for awhile, cycling up and down as you pump. Smells flooded and dies as soon as you let off or if you hold it to the floor or you get out of rhythm. I pulled up the rail with injectors still on it and none of them leak and all seem to be firing as they should (to the naked untrained eye) when you crank it over. There are no codes. Everything else seems to be operating normally, all fuses and relays are good. I'm hoping to try a new camshaft sensor tomorrow, and hopefully find an engine computer at the bone yard. If neither of those is the fix, I'm at a loss. The only other thing I could think of is the timing chain slipping, but I figured it'd still run, just poorly or the compression would be down. Anyone have any ideas or know how to check the timing chain w/o disassembling the entire front of the engine? Thank you very much for reading. |
RE: 1994 Caravan 3.3, starts and dies
Tonight I tried 2 different cam sensors and also unbolted the exhaust before the cat with no change in the situation. I also picked up a used PCM (engine computer) today also and will try swapping it in the morning.
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RE: 1994 Caravan 3.3, starts and dies
Unplugged the MAP sensor, now van runs, but poorly. Replaced sensor, runs smooth again.
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RE: 1994 Caravan 3.3, starts and dies
awesome man.. glad it worked out.. thanks for lettin us know what the deal was
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