Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!

[FIXED] 2001 ACURA CL 3.2 CRANKS/ NO START

More
4 years 9 months ago #31534 by tim.smith1
Replied by tim.smith1 on topic 2001 ACURA CL 3.2 CRANKS/ NO START
could you help me with the best setting for low amp clamp?

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago #31535 by jreardon
Replied by jreardon on topic 2001 ACURA CL 3.2 CRANKS/ NO START
What settings was it at? I'm going to guess you had it at 100mV / 1 amp mode
so the 500mV in the graph means it was hitting around 5 amps.
The following user(s) said Thank You: tim.smith1

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago - 4 years 9 months ago #31536 by jreardon
Replied by jreardon on topic 2001 ACURA CL 3.2 CRANKS/ NO START
The peaks of those current ramp were getting cut off by the icm so i think the amperage is sufficient for the icm. Whether or not there's spark occurring inside the cylinder I don't know. We can assume some things from the current ramp like I doubt all 6 coils are shorted, and you changed the plugs so the gaps should be fine (no tail at the end of the ramps).
Last edit: 4 years 9 months ago by jreardon.
The following user(s) said Thank You: tim.smith1

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago - 4 years 9 months ago #31538 by jreardon
Replied by jreardon on topic 2001 ACURA CL 3.2 CRANKS/ NO START
IGT is the low voltage control signal to ICM in each COP. I highlighted them in yellow. No need for attenuator. Pick any and backprobe one for sync and retake primary current please
500
Last edit: 4 years 9 months ago by jreardon.
The following user(s) said Thank You: tim.smith1

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago #31540 by tim.smith1
Replied by tim.smith1 on topic 2001 ACURA CL 3.2 CRANKS/ NO START
So scope is loosing internet took picks with phone amp clamp on 1mv/10ma should see green trace on scope for settings
Attachments:
The following user(s) said Thank You: Matts Auto

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago #31542 by jreardon
Replied by jreardon on topic 2001 ACURA CL 3.2 CRANKS/ NO START
Okay, first, no turn on oscillations, not sure if that's significant. Is that because not all coils have that, or because the secondary is shorted because the spark current is finding a path through the soaking wet plug, to ground? Second, what the heck is that green channel on? Where is that second channel hooked up to?
The following user(s) said Thank You: tim.smith1

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago #31543 by tim.smith1
Replied by tim.smith1 on topic 2001 ACURA CL 3.2 CRANKS/ NO START
2nd channel is on number 4 coil Control wire Brown in color. Most likely the plugs are wet. When I check fire on coils they are firing bright blue.
The following user(s) said Thank You: jreardon

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago #31544 by tim.smith1
Replied by tim.smith1 on topic 2001 ACURA CL 3.2 CRANKS/ NO START
@jreardon this should be what you are looking for I will take them again at different zooms
Attachments:
The following user(s) said Thank You: jreardon

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago #31545 by jreardon
Replied by jreardon on topic 2001 ACURA CL 3.2 CRANKS/ NO START

tim.smith1 wrote: 2nd channel is on number 4 coil Control wire Brown in color. Most likely the plugs are wet. When I check fire on coils they are firing bright blue.


Hold a plug up, with an air gap to ground, and take a current ramp on just that one coil. I want to know if the turn on oscillations are supposed to be present on these coils. I'm genuinely curious now.
The following user(s) said Thank You: tim.smith1

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago - 4 years 9 months ago #31551 by jreardon
Replied by jreardon on topic 2001 ACURA CL 3.2 CRANKS/ NO START

tim.smith1 wrote: So scope is loosing internet took picks with phone amp clamp on 1mv/10ma should see green trace on scope for settings


Did you type that correctly? 1mv /10ma ?

2nd channel is on number 4 coil Control wire Brown in color.


Can you test that brown wire again, plugged in and unplugged? That signal did not look right, although it did trigger the coil.
Last edit: 4 years 9 months ago by jreardon.
The following user(s) said Thank You: tim.smith1

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago #31553 by tim.smith1
Replied by tim.smith1 on topic 2001 ACURA CL 3.2 CRANKS/ NO START
This pick is a volt plug off of brown control wire off of coil not using amp clamp here just back probing the wire
Attachments:

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago #31554 by tim.smith1
Replied by tim.smith1 on topic 2001 ACURA CL 3.2 CRANKS/ NO START
This is checking a three wire coil that has the icm built into the coil I don't think we will see what you guys are looking for right?

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago #31556 by jreardon
Replied by jreardon on topic 2001 ACURA CL 3.2 CRANKS/ NO START

tim.smith1 wrote: this is a amp off battery and injector an coil off number 3 cylinder i hope it shows up. if i can improve image somehow please let me know


Someone please correct me if I'm wrong but shouldn't injection be taking place during intake stroke? Why is injection taking place within spark dwell time, which would be around compression stroke?
1000
The following user(s) said Thank You: tim.smith1

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago #31557 by tim.smith1
Replied by tim.smith1 on topic 2001 ACURA CL 3.2 CRANKS/ NO START
Pretty sure injection and coils fire around compression stroke I do think that an injector will fire milliseconds before the coil but not enough to truly see don't think I am wrong but if I am then explain it better.,...........where is scanner danner when you need him lol

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago #31558 by tim.smith1
Replied by tim.smith1 on topic 2001 ACURA CL 3.2 CRANKS/ NO START
So ready to give up on this car but I have never been a quitter lol

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago #31559 by jreardon
Replied by jreardon on topic 2001 ACURA CL 3.2 CRANKS/ NO START
When you took that picture, it was coil and injector on the same cylinder?
The following user(s) said Thank You: tim.smith1

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago #31560 by jreardon
Replied by jreardon on topic 2001 ACURA CL 3.2 CRANKS/ NO START
I'm good with some pictures I will try to illustrate :)
The following user(s) said Thank You: tim.smith1

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago - 4 years 9 months ago #31561 by jreardon
Replied by jreardon on topic 2001 ACURA CL 3.2 CRANKS/ NO START
Hope this makes sense :) This doesn't come easy for me either lol

Think about it, if you're spraying fuel during compression stroke, the cylinder is not going to have any gas to burn when the spark goes off !
You have to spray it when the intake valve is open during intake stroke. Then intake closes, cylinder compresses air and gas, then boom

The only time I can think of to spray gas during compression stroke is on gas direct engines where the injector tip is inside the cylinder head, spraying against cylinder compression with it's own pressure to match !


1000
Last edit: 4 years 9 months ago by jreardon.
The following user(s) said Thank You: Noah, tim.smith1

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago #31564 by jreardon
Replied by jreardon on topic 2001 ACURA CL 3.2 CRANKS/ NO START
As i think this through to its logical conclusion as best as my feeble mind can endure, the gas that's sitting behind the intake valve doesn't just disappear. The intake valve will open inevitably and the gas will get into the cylinder. This would NOT cause a no start, or would it....

My theory is the gas would not be as atomized as it could have been, had the fuel been injected through the intake valve as quickly as the injectors fired. Fuel just sitting there in a puddle, falling into the cylinder, would perhaps hinder proper ignition because it does not mix with the incoming air into the cylinder.

Perhaps this is why you have fuel soaked injectors maybe, i'm not sure.
The following user(s) said Thank You: tim.smith1

Please Log in or Create an account to join the conversation.

More
4 years 9 months ago #31566 by Tyler
Replied by Tyler on topic 2001 ACURA CL 3.2 CRANKS/ NO START
I see where you're going with your thoughts about the injector timing? But I think you'll find that most port fuel injected vehicles DON'T fire the injector during the intake stroke. :silly: It's almost always during the power or exhaust stroke.

Why? I've never gotten an answer that truly made sense to me. :( Here's an example from my own car. Triggered off #1 coil, injector fires during the exhaust stroke.

Attachments:
The following user(s) said Thank You: Noah, jreardon, tim.smith1

Please Log in or Create an account to join the conversation.

Time to create page: 0.277 seconds