Technical section questions...

[wed3k]

even the tech section questions seem a little too remedial or simple? All the beginner's questions are so easy that everyone jumps on them.

I swear, hondas dont have hard problems.

[DJ metadelic]

yeah i think if i wanted a challenge i'd be driving something euro. they are quite easy to decipher and diagnose, yet not all the time. sometimes i think it'd be better if the tech sections were organized differently, like maybe blended together. it is normally harder to get quick responses in the regular tech section, but most of the posts in the noob section are redundant.

[wed3k]

we occasionally get an electrical question but it usually goes nowhere because the OP cant describe how he or she is diagnosing the issue or just doesnt even have a simple multimeter or a jumper wire to test a solenoid.

you want to fix a problem but you need the right tools for the job.

the VW guys just bring their shit to the dealer or mechanic and then they bring it back after they spent 2k in repairs. it's kinda annoying how 80% of them dont even have simple tool sets.

[evil_demon_01]

I swear, hondas dont have hard problems.

EU1 Civic.
Symptom - Car cuts out randomly and won't start for 5 minutes or longer.
When it does restart, it might take anywhere between 5 minutes to 2 days for the problem to reoccur.

Code indicates CKP sensor faulty, but sensor and associated wiring is fine.

[wed3k]

does the signal make it to the ecu? and what conditions are you testing it in?

id have a snap on vantage hooked up at the ecu and drive that mother till it dies and check out the vantage. Reproducing issues are sometimes the hardest part. is the voltage output high enough?

[evil_demon_01]

does the signal make it to the ecu? and what conditions are you testing it in?

id have a snap on vantage hooked up at the ecu and drive that mother till it dies and check out the vantage. Reproducing issues are sometimes the hardest part. is the voltage output high enough?

Yes signal makes it to ECU.
Voltage output is correct.
With HDS connected, datalogging shows the CKP sensor dies at the time of the fault, Also the fuel gauge shows empty when it happens.
Replaced CKP - Same fault and code appears.

Sometimes has no fuel, and sometimes has no spark when fault occurs.




As you say, most people don't even own a multimeter.
And people that want help don't always seem willing to give the required information.
This is one of the biggest issues to - No-one asks the correct questions to obtain the info for diagnosis.

[wed3k]

any work done prior to this event? sounds like a bad ground.

[evil_demon_01]

Only work done was a cambelt.
Problem not caused by a bad earth.

[wed3k]

whats the spacing between the ckp and the gear? ive done a couple timing belts on the newer ones and those ckp's are kinda a bitch to work around or are a little brittle. when it dies, have you tried tapping on the ecu while cranking?

[evil_demon_01]

whats the spacing between the ckp and the gear? ive done a couple timing belts on the newer ones and those ckp's are kinda a bitch to work around or are a little brittle.

Are you referring to the CKP or CMP sensor?
The camshaft has endfloat which is only just within the allowable spec.
And the CKP gap is correct.

Diddn't try tapping the ECU.

[owequitit]

Only work done was a cambelt.
Problem not caused by a bad earth.

Did you measure the gap on the CKP? Even though they don't seem like it, they are actually minorly adjustable. That is the only thing I can think of off the top of my head that would explain an intermittent signal that would coincide with the T-belt change. That or a ground is loose, you damaged the wiring harness, or something isn't plugged in correctly.

I would start working backwards (or forward) from the T-belt job, because if it wasn't there before, and is there now, it has to be related to that.

[evil_demon_01]

Did you measure the gap on the CKP? Even though they don't seem like it, they are actually minorly adjustable. That is the only thing I can think of off the top of my head that would explain an intermittent signal that would coincide with the T-belt change. That or a ground is loose, you damaged the wiring harness, or something isn't plugged in correctly.

I would start working backwards (or forward) from the T-belt job, because if it wasn't there before, and is there now, it has to be related to that.

Just to clarify, this job was done about 8 months ago, It was one of the most time consuming and fustrating jobs I've had to do.
I've since fixed 3 other cars with the same problem.

The problem has nothing to do with the cambelt job (and was not caused by it, that was pure coincidence that it happened shortly after), And the CKP gap is correct.
Grounds are all fine, everything is plugged in, and the wiring isn't damaged.

[Ilikebigbutts]

Just to clarify, this job was done about 8 months ago, It was one of the most time consuming and fustrating jobs I've had to do.
I've since fixed 3 other cars with the same problem.

The problem has nothing to do with the cambelt job (and was not caused by it, that was pure coincidence that it happened shortly after), And the CKP gap is correct.
Grounds are all fine, everything is plugged in, and the wiring isn't damaged.

How is cam/crank sync?Had a 2.0 sohc Chrysler where the pin on the cam shaft was broken.Would soem times run fine, some times run shitty, and sometimes not run at all...Was only able to figure it out because ca/crank differance was fluctuating between 9-15 degrees...

Curious as to what the problem was...I've also seen the windows on the cam gear loosen up and turn maybe 2-3 degrees...

i-vtec motor? did it have some kind of weir cam phaser problem?

really curious now....

[Macaqueistrong]

Other Automotive Tech and Performance.

[evil_demon_01]

How is cam/crank sync?Had a 2.0 sohc Chrysler where the pin on the cam shaft was broken.Would soem times run fine, some times run shitty, and sometimes not run at all...Was only able to figure it out because ca/crank differance was fluctuating between 9-15 degrees...

Curious as to what the problem was...I've also seen the windows on the cam gear loosen up and turn maybe 2-3 degrees...

i-vtec motor? did it have some kind of weir cam phaser problem?

really curious now....

Cam/crank sync is perfect.
Not i-vtec, D17 engine.

Once I got to this point I was about 16 hours into the job.
Thats 16hours @ $100 an hour = $1600 . . . Customer just starting to get a bit upset, but still wanted us to carry on and find/fix the problem.

After adding about another 8 hours on the job and talking with Japan, we finally found the problem to be an intermittent fault in the ECU.
And before anyone says "why didn't you just do that in the first place" Well trying to sell a customer a $1500ecu on a guess isn't really a good idea.