Engine wont run?

Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,542 POSTS
  • 1991 PLYMOUTH ACCLAIM
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 133,000 MILES
1991 Plymouth Acclaim mileage: 133,000. Yesterday my wife drove to work, when she pulled into the parking lot and stopped at a stop sign the car died and would not start. It appears that it is not getting a spark. I took off one of the spark plug wires and grounded it while trying to start it, no spark. I thought it must be the coil, bought a new one and replaced the old coil and still no spark at all (Not even from the coil itself). I took off the top wire and grounded it with a screwdriver and still nothing. I've checked the wires, the distributor and cap, the rotor, nothing is cracked or wet. Someone said something to me about the pick up sensor under the distributor. Do you have any suggestions?
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Friday, July 24th, 2020 AT 6:20 PM (Merged)
Tiny
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Here are some things to have checked: 1. Check to see if the timing belt has failed, 2. Check for fuel pressure, 3. Scan P.C.M. (Computer) for fault or error codes. The information should pinpoint the malfunctioning components.
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Friday, July 24th, 2020 AT 6:20 PM (Merged)
Tiny
MISSMAC_33
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I don't have an rpm meter so I'm not sure how I'm supposed to get an rpm signal. And the other thing I notice when trying to start it is that the battery seems to drain after the first time. It starts out with enough battery after sitting for a night.
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Friday, July 24th, 2020 AT 6:20 PM (Merged)
Tiny
JDL
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You have to use a scanner that shows live engine data. If there is no spark or only one and no fuel injector pulse, then I suspect the computer either doesn't see an rpm sinal or isn't reacting to it. There is a hall switch in the distributor, that's where the rpm signal comes from. It could be several issues, hard to be sure without testing.
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Friday, July 24th, 2020 AT 6:20 PM (Merged)
Tiny
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You may have to take the battery off and get it charged.
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Friday, July 24th, 2020 AT 6:20 PM (Merged)
Tiny
MISSMAC_33
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What exactly is an asd relay and what does it do?
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Friday, July 24th, 2020 AT 6:20 PM (Merged)
Tiny
JDL
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Without proper test instruments and the fact that I can't see your vehicle from here, it makes it harder. You can test for ref voltage--ground and signal from hall switch. Without at least a digital multimeter, it's hard to do anything.
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Friday, July 24th, 2020 AT 6:20 PM (Merged)
Tiny
MISSMAC_33
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Okay. But what is an asd relay and what does it do?
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Friday, July 24th, 2020 AT 6:20 PM (Merged)
Tiny
DANNYO
  • MEMBER
  • 9 POSTS
  • 1991 PLYMOUTH ACCLAIM
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 94,000 MILES
My 1991 Acclaim won't start. I have no spark from coil to distributor. Changed coil. Didn't help. Any ideas?
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Friday, July 24th, 2020 AT 6:20 PM (Merged)
Tiny
JDL
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Hello, did you test the coil primary circuits for voltage. The positive and negative terminals, engine cranking. Is the coil wire ok? Any troublecodes?
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Friday, July 24th, 2020 AT 6:20 PM (Merged)
Tiny
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If your battery is down, we're just spinning our wheels. The asd relay supplies primary voltage to the ignition coil-- voltage to the fuel injector-- voltage to the 02 heater circuit-- voltage to the fuel pump, according to my info. If you want to replace the relay, that is up to you. You may get lucky?
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Friday, July 24th, 2020 AT 6:20 PM (Merged)
Tiny
DANNYO
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I get.0007 on both legs of coil input. Codes 12 35 32 21 55. The coil wire is ok
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Friday, July 24th, 2020 AT 6:20 PM (Merged)
Tiny
JDL
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Just to add, if there is more than one relay in the relay pack, look at them, if they are the same as asd relay, swap that relay, see if it helps?
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Friday, July 24th, 2020 AT 6:20 PM (Merged)
Tiny
JDL
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Is the battery and cables ok? I didn't see anything in the codes, that might cause a no spark condition. I'd probable check the hall switch in the distributor, first. Three wire connector, ref voltage--signal-- ground, that is the rpm signal, without that signal, you get nothing.

That should be close to battery voltage at the coil and injectors, during cranking.
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Friday, July 24th, 2020 AT 6:20 PM (Merged)
Tiny
MISSMAC_33
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I gotcha. Well I replaced it with my a/c relay and now I hear the fuel pump but only after trying to start the car. I am charging the battery to see if it will start with a full charge but otherwise I'm out of ideas.
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Friday, July 24th, 2020 AT 6:20 PM (Merged)
Tiny
DANNYO
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I don't have 12v at the coil before during or after cranking. Someone told me it could be a maxi-breaker? There are 5 Maxi-breakers on the wheel well. I don't know which is for ignition. Any Ideas?
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Friday, July 24th, 2020 AT 6:21 PM (Merged)
Tiny
JDL
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Below is the location of asd relay.
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Friday, July 24th, 2020 AT 6:21 PM (Merged)
Tiny
JDL
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Did you check for codes? You cycle the key, on--off, on---off, on, then the check engine lite goes to flashing, you count the flashes to get the codes. When you cycle the switch, you don't crank it. Under the hood driver side, the asd relay shows to be the forward most relay. The asd relay supplies voltage to the coil--injectos--fuel pump, during cranking. You'll have to check for voltage and ground at the relay.
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Friday, July 24th, 2020 AT 6:21 PM (Merged)
Tiny
MISSMAC_33
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Well the battery charged fully and I tried to start it but still not working. The battery went from 100-0 after starting it. Like I said before, I switched out the asd relay with another and immediately after trying to start the car I hear the fuel pump but not before.
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Friday, July 24th, 2020 AT 6:21 PM (Merged)
Tiny
DANNYO
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The codes are
I get.0007 on both legs of coil input. Codes 12 35 32 21 55. The coil wire is ok what does the asd relay look like? Is it on driver side wheel well?
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Friday, July 24th, 2020 AT 6:21 PM (Merged)

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