94 Aerostar Idle problems
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Joined: Dec 2013
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94 Aerostar Idle problems
I just replaced the water pump and put it all back together, now it won't run well enough to drive.
Checked vacuum system, all sensor connections, hoses, gas cap, changed fuel filter, I can hear the fuel pump kick in, reset system with battery disconnected and have looked at everything I can think of so far.
Now - starts fine, idles about 10 seconds and then begins to idle rough and dies. If I use the throttle I can often keep the idle up, but then backfires or acts like no fuel and again dies. Used fuel cleaner and made sure there was plenty fuel in tank.
I am looking at replacing sensors at this point and am asking for suggestions as to which one first?? They get a bit expensive real quick.
Checked vacuum system, all sensor connections, hoses, gas cap, changed fuel filter, I can hear the fuel pump kick in, reset system with battery disconnected and have looked at everything I can think of so far.
Now - starts fine, idles about 10 seconds and then begins to idle rough and dies. If I use the throttle I can often keep the idle up, but then backfires or acts like no fuel and again dies. Used fuel cleaner and made sure there was plenty fuel in tank.
I am looking at replacing sensors at this point and am asking for suggestions as to which one first?? They get a bit expensive real quick.
Senior User
Joined: Dec 2006
Posts: 194
Likes: 1
From: Surrey BC Canada
Yes, it seems very likely you may have neglected to reattach something, or something got unintentionally unattached. Sounds like the coolant temperature sensor is not functioning, that is if you have the symptom of the exhaust blowing a bit of black smoke. Unplug the coolant temperature sensor wire, then if things don't change, then you know the problem.
Senior User
Joined: Dec 2006
Posts: 194
Likes: 1
From: Surrey BC Canada
Actually no. A long time ago, my vehicle had a similar problem as above. When I opened the hood, I looked around and discovered that some sort of projectile had entered the engine compartment and had partially severed the wiring which connects to the coolant temperature sensor. After a futile attempt at the junkyard, I managed to repair the wire using a soldering iron and electrical tape.
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