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[FIXED]1996 Caravan 2.4L Ignition Control
- Chad
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- I am not a parts changer.
8 years 4 months ago - 8 years 4 months ago #12258
by Chad
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
[FIXED]1996 Caravan 2.4L Ignition Control was created by Chad
Any thoughts on these waves? Green trace (#2) is Coils 1 & 2 Current. Yellow trace (#1) is coil 1 control. Blue trace (#3) is coil #2 control.
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
Last edit: 8 years 4 months ago by Chad. Reason: FIXED
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- Tyler
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- Full time HACK since 2012
8 years 4 months ago #12274
by Tyler
Replied by Tyler on topic 1996 Caravan 2.4L Ignition Control
I'll take crank sensor for $200, Alex. 
:lol:
But seriously, those captures are b.a.n.a.n.a.s. Does this thing even run? I think cam/crank would be my next check.
:lol:But seriously, those captures are b.a.n.a.n.a.s. Does this thing even run? I think cam/crank would be my next check.
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- Chad
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8 years 4 months ago #12276
by Chad
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
Replied by Chad on topic 1996 Caravan 2.4L Ignition Control
It runs. It idles, nicely. No load, WOT snap, just fine. Can even power-brake.:huh: But put it in drive and start driving and, within a few yards, it turns to CRAP. Sputter and stumbles and lurches...it drives just like the waves look. I'll get waveforms of the Cmp and Ckp, tomorrow.
I'll also go over the wiring harness with a fine-tooth comb. It seems, to me, the two control circuits are shorting together???
I'll also go over the wiring harness with a fine-tooth comb. It seems, to me, the two control circuits are shorting together???
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
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- Chad
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- I am not a parts changer.
8 years 4 months ago - 8 years 4 months ago #12426
by Chad
DING! DING! DING! We have a winner!
I finally got back to this one. Scoped the cam and crank from the PCM connector.
Raised the vehicle to visually inspect the crank sensor due a wiggle test. A wiggle test proved the ckp sensor connector to be bad. I noticed the wiring harness resting in the C.V. shaft. This explained why I could power brake and only had a problem while ACTUALLY moving. As the C.V. shaft turned, it moved the wiring harness.
Those first waves, I believe, are (partially) an effect. Subsequent test drives did not produce such violent drivability problems. I believe that my T-pins may have, intermittently, shorted together as the vehicle sputtered and jumped (due to the bad ckp signal).
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
Replied by Chad on topic 1996 Caravan 2.4L Ignition Control
Tyler wrote: I'll take crank sensor for $200, Alex.
DING! DING! DING! We have a winner!
I finally got back to this one. Scoped the cam and crank from the PCM connector.
Raised the vehicle to visually inspect the crank sensor due a wiggle test. A wiggle test proved the ckp sensor connector to be bad. I noticed the wiring harness resting in the C.V. shaft. This explained why I could power brake and only had a problem while ACTUALLY moving. As the C.V. shaft turned, it moved the wiring harness.
Those first waves, I believe, are (partially) an effect. Subsequent test drives did not produce such violent drivability problems. I believe that my T-pins may have, intermittently, shorted together as the vehicle sputtered and jumped (due to the bad ckp signal).
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
Last edit: 8 years 4 months ago by Chad.
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- Tyler
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8 years 4 months ago #12441
by Tyler
Hah! Nice catch. 
Now that you mention it, I remember a SD video along the same lines:
So nothing else got cooked by the extreme dwell time? :lol:
Replied by Tyler on topic 1996 Caravan 2.4L Ignition Control
pole71 wrote: Raised the vehicle to visually inspect the crank sensor due a wiggle test. A wiggle test proved the ckp sensor connector to be bad. I noticed the wiring harness resting in the C.V. shaft. This explained why I could power brake and only had a problem while ACTUALLY moving. As the C.V. shaft turned, it moved the wiring harness.
Hah! Nice catch.
Now that you mention it, I remember a SD video along the same lines:So nothing else got cooked by the extreme dwell time? :lol:
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- Chad
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8 years 4 months ago #12444
by Chad
Doesn't seem so.
But, now, I am definitely getting these.
www.aeswave.com/Test-Drive-Test-Leads-fo...-on-VERUS-p9036.html
Affiliate link?
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
Replied by Chad on topic 1996 Caravan 2.4L Ignition Control
Tyler wrote: So nothing else got cooked by the extreme dwell time? :lol:
Doesn't seem so.
But, now, I am definitely getting these.
www.aeswave.com/Test-Drive-Test-Leads-fo...-on-VERUS-p9036.html
Affiliate link?
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
Please Log in or Create an account to join the conversation.
- Tyler
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- Full time HACK since 2012
8 years 4 months ago #12445
by Tyler
Replied by Tyler on topic 1996 Caravan 2.4L Ignition Control
You'll love 'em. I caught a Ford transmission issue with those just recently, couldn't have done it otherwise.
I caught a Ford transmission issue with those just recently, couldn't have done it otherwise. Please Log in or Create an account to join the conversation.
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