Opti theory
Thread Starter
Burning Brakes
Joined: Sep 2001
Posts: 1,011
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From: Jupiter Florida
Opti theory
I've noticed that occasionally after idling for a minute I start to get some misfires and surging. I'm thinking 'great, there goes the opti'. I diagnose a little and find this;
I can run my car all damned day and never have a misfire without the A/C. Lately it's been 95+ degrees and humid beyond belief. When I run the A/C for awhile, the misfire returns.
I suspect the accumulator/dryer/receiver/whatever that the brainiacs at GM located directly in front of the cat-scared-of-water opti is dripping condensation and the fan is blowing it directly on the piece of *#@%$.
How many optis are crapping out because of this? Has anybody put a sock on their A/C hardware?
I can run my car all damned day and never have a misfire without the A/C. Lately it's been 95+ degrees and humid beyond belief. When I run the A/C for awhile, the misfire returns.
I suspect the accumulator/dryer/receiver/whatever that the brainiacs at GM located directly in front of the cat-scared-of-water opti is dripping condensation and the fan is blowing it directly on the piece of *#@%$.
How many optis are crapping out because of this? Has anybody put a sock on their A/C hardware?
Melting Slicks
Joined: May 2002
Posts: 3,424
Likes: 1
From: Tucson Az
St. Jude Contributor
Re: Opti theory (rocketfinger)
Not very likely ! ! ! ! The 3 small holes (1/16 -1/8 dia) are located on the very bottom of the aluminum plate (housing) of the opti. Moisture has to come UP from there to bother it. A drip would never get there, even behind the wind from fans. . . . . . . Your problem sounds more electrical, possibly the ECM ? ? ? ? :cheers:
Drifting
Joined: May 2001
Posts: 1,726
Likes: 1
From: COCOA Florida
Re: Opti theory (rocketfinger)
Could you be having a voltage drop due to the compressor load on the engine/alternator assemblies. might watch the voltage and possible the amps as the blower motor could be a factor on the alternator if it is drawing excess or higher than normal current. hope it helps, just idea off the top of my head.
Thread Starter
Burning Brakes
Joined: Sep 2001
Posts: 1,011
Likes: 0
From: Jupiter Florida
Re: Opti theory (C4TOMCAT)
Could you be having a voltage drop due to the compressor load on the engine/alternator assemblies.
Le Mans Master
Joined: Jan 2000
Posts: 6,376
Likes: 21
From: Traverse City MI
Re: Opti theory (rocketfinger)
The seal that is inside the opti between the cap and the main unit is known to shrink over time and this can make them victum to moisture.
It would be hard for moisture to be blown into the unit by the fans, the water has to get past the balancer first. Try inspecting your engine when you are having a problem and see if you can see where things are getting wet.
Do you notice it right away or after the build up of condensation?
It would be hard for moisture to be blown into the unit by the fans, the water has to get past the balancer first. Try inspecting your engine when you are having a problem and see if you can see where things are getting wet.
Do you notice it right away or after the build up of condensation?
Melting Slicks
Joined: May 2002
Posts: 3,424
Likes: 1
From: Tucson Az
St. Jude Contributor
Re: Opti theory (Aaron71771)
The opti will either work, or not work. If (enough) moisture is getting into it, it won't run for a few days, not until it dry's out ! ! ! Fact, I've been there. And besides, the condensation from the A/C doesn't drip there, it drips closer to the firewall. :D
