I saw you replaced the pickup already and should have mentioned that. About 90 percent of the people use incorrect terminology or don't understand what they're talking about or were told so it's just easier to cover all the bases even when it means repeating some things.
My daily driver is an '88 Grand Caravan. I ran into a similar problem two years ago and it was extremely intermittent until after a year that was the first time in its life it didn't get me back home. In my case it would stall on hot days at anything over 1/4 throttle. It didn't act like loss of fuel pressure so assuming it was loss of spark, I used a stretched-out cotter pin under the hood to bypass the starter relay to check. By the time I opened the hood, unplugged the relay, and pulled the coil wire, I had spark again and the engine would start. After a year of this, when it failed completely it turned out to be the ignition coil.
You can do the same thing. Your starter relay will have four terminals with possibly five wires. Two will be fatter. They're red and brown. One of the smaller wires is yellow and there may be two of them on one terminal. Unplug that relay, then jump the red and brown wires to crank the engine while you watch for spark.
Don't worry about the ASD relay. They rarely fail, but when they do it's usually due to corroded contacts and they aren't intermittent.
Sunday, May 19th, 2013 AT 10:37 AM