pretty sure my opti took a dump
09-02-2010, 12:32 AM
#21
He's right. Optical sensor --> signal to PCM --> command to coil to discharge.
http://shbox.com/1/4th_gen_tech2.html#opti_test
Also, have you looked at the harness connector between opti and the rest of the harness ("pigtail")?
Don't forget to test the coil again (new ones go out, too) AND have the ICM tested to make sure you're not blowing through coils needlessly due to a faulty ICM.
http://shbox.com/1/4th_gen_tech2.html#opti_test
Also, have you looked at the harness connector between opti and the rest of the harness ("pigtail")?
Don't forget to test the coil again (new ones go out, too) AND have the ICM tested to make sure you're not blowing through coils needlessly due to a faulty ICM.
09-02-2010, 08:03 PM
#23
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So my ignition woes continue, driving along today on my trip, car has been running great, I had the order on the cap messed up, oops, anyway all of a sudden it stops running alongside the freeway, and won't start. No ses light, missing, all of a sudden it quit running. My sis's boyfriend cam and got me, we tested for spark, no spark at the coil, now I think its the icm, but he thinks the opti went out and he also thinks that the opti controls the spark, but who's right here?
Dude, your car pops and sputters at startup? It misses? You drive the thing and all of a sudden it cuts out? Why didn't you listen to the mechanic who told you to change the cap and rotor? Your contacts in the cap are likely worn out. It barely contacts when cold hence the misfires. When it heats up the cap expands and since the rotor is worn the components lose contact resulting in no spark. It is not your ICM.
Chandler has told you the price of his cap and rotor. It's a good unit, I have seen it. Go for it.
09-02-2010, 10:37 PM
#25
So my ignition woes continue, driving along today on my trip, car has been running great, I had the order on the cap messed up, oops, anyway all of a sudden it stops running alongside the freeway, and won't start. No ses light, missing, all of a sudden it quit running. My sis's boyfriend cam and got me, we tested for spark, no spark at the coil, now I think its the icm, but he thinks the opti went out and he also thinks that the opti controls the spark, but who's right here?
09-03-2010, 01:00 AM
#27
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It was the icm, it was deadder than a doornail, it failed the first time when I had it tested at autozone.
When it was missing, it turns out I had the firing order messed up somehow, I feel like a moron, but we live and learn. Yesterday when it died I was going down the freeway and it just died all of a sudden. I ment to say that I didn't have the SES light or any missing just dead.
Now its running like a raped ape again, but when I started it up, it had a loud lifter tick, that slowly went away as it warmed up and has not returned.
Yes there is a test for the icm, take it to autozone, if they tell you they can't test it tell them their a moron, they can.
I've been wanting to do a cap and rotor, but I also want to do the water pump at the same time, I will be able to do it probablly twards the end of this month.
Now my sis's bf, he has a 95 formula also, he was telling me that when an opti gets around 100k, its basically on borrowed time, and that I should just replace it while I'm in there, is there any truth to this? It was my understanding that the main causes for the opti to fail is moisture and the cap and rotor failing.
The only thing that I can maybe think that mine might be on borroed time is that a coupple of months ago, my heater hose sprung a pinhole leak, and was pissin all over the pump, I don't know how long it was doing this, so I don't have an idea as to how much leaked on everything.
When it was missing, it turns out I had the firing order messed up somehow, I feel like a moron, but we live and learn. Yesterday when it died I was going down the freeway and it just died all of a sudden. I ment to say that I didn't have the SES light or any missing just dead.
Now its running like a raped ape again, but when I started it up, it had a loud lifter tick, that slowly went away as it warmed up and has not returned.
I've been wanting to do a cap and rotor, but I also want to do the water pump at the same time, I will be able to do it probablly twards the end of this month.
Now my sis's bf, he has a 95 formula also, he was telling me that when an opti gets around 100k, its basically on borrowed time, and that I should just replace it while I'm in there, is there any truth to this? It was my understanding that the main causes for the opti to fail is moisture and the cap and rotor failing.
The only thing that I can maybe think that mine might be on borroed time is that a coupple of months ago, my heater hose sprung a pinhole leak, and was pissin all over the pump, I don't know how long it was doing this, so I don't have an idea as to how much leaked on everything.
09-03-2010, 03:23 PM
#28
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Dude, your car pops and sputters at startup? It misses? You drive the thing and all of a sudden it cuts out? Why didn't you listen to the mechanic who told you to change the cap and rotor? Your contacts in the cap are likely worn out. It barely contacts when cold hence the misfires. When it heats up the cap expands and since the rotor is worn the components lose contact resulting in no spark. It is not your ICM.
Chandler has told you the price of his cap and rotor. It's a good unit, I have seen it. Go for it.
Chandler has told you the price of his cap and rotor. It's a good unit, I have seen it. Go for it.
09-05-2010, 12:59 AM
#29
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I'm having similar problems with my T/A. had a pretty serious stumble below 2k. Now, nothing, no spark whatsoever. First thing I did was check fuses, all good. Took my ICM to autozone, and they ran it thru 5 back-to-back tests, and it passed them all. I'll be following shoebox's guide to test the Opti (its an older ACCEL unit that was on the car when I bought it), and if it's bad, I'll be calling Chandler.
09-07-2010, 01:09 PM
#30
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I'm having similar problems with my T/A. had a pretty serious stumble below 2k. Now, nothing, no spark whatsoever. First thing I did was check fuses, all good. Took my ICM to autozone, and they ran it thru 5 back-to-back tests, and it passed them all. I'll be following shoebox's guide to test the Opti (its an older ACCEL unit that was on the car when I bought it), and if it's bad, I'll be calling Chandler.
