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'95 Caravan Fuel Pump or Relay Issue ?
Chrysler Dodge, Plymouth, Jeep, Eagle, etc info/talk (rec.autos.makers.chrysler)
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#11
 
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Re: '95 Caravan Fuel Pump or Relay Issue ? -
02-26-2007
, 08:04 PM
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Chevydriver37 wrote: Now I'm noticing that right after it dies, I shut the key off, wait about a minute, turn the key back on, and I DONT hear the fuel pump. Wait another minute or two, then I hear the pump... A test you can do: After it dies and you turn the key off and back on and don't hear the pump, crank it and see if you get sparks. The same relay (ASD relay) controls both the ignition system and the fuel pump. If you get spark but no pump, the problem is downstream of the relay. If you get no spark and no pump, the whole system controlled by that relay is failing to power up. If this is the case, check the line coming to the ASD. I had a problem on a few of my older vans ('88, '89 and '90) where the line directly from the battery + to the ASD relay did not have 12 volts (it is supposed to at all times, key on or off). On two of these vehicles it was a permanent failure, and a jumper wire permanently installed from the ASD to the battery fixed it. On the '89 it was an intermittent problem. I'm not saying that it is likely in your case, but it's worth checking. |
the ASD relay with the A/C clutch relay. Started her up, she ran for
about 10 mins, then died. PI**ED me off... (Sorry Tom...) Checked
the relay for 12V, it's right on.
Then I got to thinking about bad connections, etc., so I restarted her
and pulled the connector from the MAF (MAP?) sensor that's attached to
the plenum, behind the distributor. The engine came to a very abrupt
halt. I plugged it back in, restarted it, and it's still running
after about an hour or so. I also poked around every other
connection under the hood, and couldn't even get so much as a
misfire,or a light-flicker, so I let everything be.
Put the trans in R, D, D2, D1, P, shut it down, then checked for
codes. Got a 12, and a 55.
Fixed? Not sure. Seems to not die after 10 mins. I'll let the
engine cool and go out and try again. If not, off to the dealer.
Thanks to all who offered up help/advice, etc.
Rick
#12
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On Sun, 25 Feb 2007 20:50:06 -0600, Robert Reynolds <robbie (AT) kcnet (DOT) com wrote: Chevydriver37 wrote: Now I'm noticing that right after it dies, I shut the key off, wait about a minute, turn the key back on, and I DONT hear the fuel pump. Wait another minute or two, then I hear the pump... A test you can do: After it dies and you turn the key off and back on and don't hear the pump, crank it and see if you get sparks. The same relay (ASD relay) controls both the ignition system and the fuel pump. If you get spark but no pump, the problem is downstream of the relay. If you get no spark and no pump, the whole system controlled by that relay is failing to power up. If this is the case, check the line coming to the ASD. I had a problem on a few of my older vans ('88, '89 and '90) where the line directly from the battery + to the ASD relay did not have 12 volts (it is supposed to at all times, key on or off). On two of these vehicles it was a permanent failure, and a jumper wire permanently installed from the ASD to the battery fixed it. On the '89 it was an intermittent problem. I'm not saying that it is likely in your case, but it's worth checking. Well, yet another update....: Before starting it up, I swapped out the ASD relay with the A/C clutch relay. Started her up, she ran for about 10 mins, then died. PI**ED me off... (Sorry Tom...) Checked the relay for 12V, it's right on. Then I got to thinking about bad connections, etc., so I restarted her and pulled the connector from the MAF (MAP?) sensor that's attached to the plenum, behind the distributor. The engine came to a very abrupt halt. I plugged it back in, restarted it, and it's still running after about an hour or so. I also poked around every other connection under the hood, and couldn't even get so much as a misfire,or a light-flicker, so I let everything be. Put the trans in R, D, D2, D1, P, shut it down, then checked for codes. Got a 12, and a 55. Fixed? Not sure. Seems to not die after 10 mins. I'll let the engine cool and go out and try again. If not, off to the dealer. Thanks to all who offered up help/advice, etc. Rick |
#13
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Well, after fixing my computer, I'm finally back online. The issue with the pump was a bad wire in the pump harness. After some time, the pump would not prime upon turning the key. That said, I figured there was a power problem. I found that the pump harness was replaced at one time, and the wires were just connected, twisted, and secured with electrical tape. Not a very good way to wire something that sits underneath a vehicle... Needless to say, I wasn't a happy camper. But, lesson learned. Thanks to all who helped out - I learned a lot. Rick On Mon, 26 Feb 2007 21:04:19 -0500, Rick <chevydriver37 (AT) yahoo (DOT) com wrote: On Sun, 25 Feb 2007 20:50:06 -0600, Robert Reynolds <robbie (AT) kcnet (DOT) com wrote: Chevydriver37 wrote: Now I'm noticing that right after it dies, I shut the key off, wait about a minute, turn the key back on, and I DONT hear the fuel pump. Wait another minute or two, then I hear the pump... A test you can do: After it dies and you turn the key off and back on and don't hear the pump, crank it and see if you get sparks. The same relay (ASD relay) controls both the ignition system and the fuel pump. If you get spark but no pump, the problem is downstream of the relay. If you get no spark and no pump, the whole system controlled by that relay is failing to power up. If this is the case, check the line coming to the ASD. I had a problem on a few of my older vans ('88, '89 and '90) where the line directly from the battery + to the ASD relay did not have 12 volts (it is supposed to at all times, key on or off). On two of these vehicles it was a permanent failure, and a jumper wire permanently installed from the ASD to the battery fixed it. On the '89 it was an intermittent problem. I'm not saying that it is likely in your case, but it's worth checking. Well, yet another update....: Before starting it up, I swapped out the ASD relay with the A/C clutch relay. Started her up, she ran for about 10 mins, then died. PI**ED me off... (Sorry Tom...) Checked the relay for 12V, it's right on. Then I got to thinking about bad connections, etc., so I restarted her and pulled the connector from the MAF (MAP?) sensor that's attached to the plenum, behind the distributor. The engine came to a very abrupt halt. I plugged it back in, restarted it, and it's still running after about an hour or so. I also poked around every other connection under the hood, and couldn't even get so much as a misfire,or a light-flicker, so I let everything be. Put the trans in R, D, D2, D1, P, shut it down, then checked for codes. Got a 12, and a 55. Fixed? Not sure. Seems to not die after 10 mins. I'll let the engine cool and go out and try again. If not, off to the dealer. Thanks to all who offered up help/advice, etc. Rick |
#14
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Some of the best maintained used cars I've seen belonged to people who knew nothing about cars BUT they *knew* that they knew nothing and so never tried to "fix" things themselves. Watch out for those quick&dirty home "fixes" done by folks who should'a left it to a professional. "Rick" <chevydriver37 (AT) yahoo (DOT) com> wrote in message news:9fhg03t8mh47possaai3s0vu7gqm8mluvi (AT) 4ax (DOT) com... Well, after fixing my computer, I'm finally back online. The issue with the pump was a bad wire in the pump harness. After some time, the pump would not prime upon turning the key. That said, I figured there was a power problem. I found that the pump harness was replaced at one time, and the wires were just connected, twisted, and secured with electrical tape. Not a very good way to wire something that sits underneath a vehicle... Needless to say, I wasn't a happy camper. But, lesson learned. Thanks to all who helped out - I learned a lot. Rick On Mon, 26 Feb 2007 21:04:19 -0500, Rick <chevydriver37 (AT) yahoo (DOT) com wrote: On Sun, 25 Feb 2007 20:50:06 -0600, Robert Reynolds <robbie (AT) kcnet (DOT) com wrote: Chevydriver37 wrote: Now I'm noticing that right after it dies, I shut the key off, wait about a minute, turn the key back on, and I DONT hear the fuel pump. Wait another minute or two, then I hear the pump... A test you can do: After it dies and you turn the key off and back on and don't hear the pump, crank it and see if you get sparks. The same relay (ASD relay) controls both the ignition system and the fuel pump. If you get spark but no pump, the problem is downstream of the relay. If you get no spark and no pump, the whole system controlled by that relay is failing to power up. If this is the case, check the line coming to the ASD. I had a problem on a few of my older vans ('88, '89 and '90) where the line directly from the battery + to the ASD relay did not have 12 volts (it is supposed to at all times, key on or off). On two of these vehicles it was a permanent failure, and a jumper wire permanently installed from the ASD to the battery fixed it. On the '89 it was an intermittent problem. I'm not saying that it is likely in your case, but it's worth checking. Well, yet another update....: Before starting it up, I swapped out the ASD relay with the A/C clutch relay. Started her up, she ran for about 10 mins, then died. PI**ED me off... (Sorry Tom...) Checked the relay for 12V, it's right on. Then I got to thinking about bad connections, etc., so I restarted her and pulled the connector from the MAF (MAP?) sensor that's attached to the plenum, behind the distributor. The engine came to a very abrupt halt. I plugged it back in, restarted it, and it's still running after about an hour or so. I also poked around every other connection under the hood, and couldn't even get so much as a misfire,or a light-flicker, so I let everything be. Put the trans in R, D, D2, D1, P, shut it down, then checked for codes. Got a 12, and a 55. Fixed? Not sure. Seems to not die after 10 mins. I'll let the engine cool and go out and try again. If not, off to the dealer. Thanks to all who offered up help/advice, etc. Rick |
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