Emissions Control Computer

4lowNgo

 
Joined
Feb 10, 2003
Messages
266
Location
Rogue Valley
According to my mechanic, the Emissions Control Computer, where it hooks up with the Fuel Cutoff Solenoid, is fouling the fuel flow. They're proposing a bypass of the solenoid, rather than replace the costly ECC.

Some background: I've had a big problem with engine cutting out for quite some time, and some trial-and-error testing has brought them to the conclusion that this will solve the problem. I can only hope; this has been a huge thorn in my side for a looooong time.

What are your thoughts on bypassing the fuel cutoff solenoid? I was told that it merely regulates fuel flow on long decellerations, like on long hills. And that doing this will prolly make my mpg worse, but that the system was mostly designed to satisfy emissions standards of the 80's.

I asked that they leave enough wire so I can install a replacement ECC if I can find an affordable one. Or, I just drive it the way they've fixed it.


Thanks,
Derek
 
Joined
Aug 2, 2004
Messages
3,550
Location
San Francisco Bay Area
I would check the connection and make sure the pins are all making good contact.My temp sensor in the CAT was flaking and found it to be the connector not making good contact with the pins. The emission's control computer is pretty basic electronics. I pulled mine and diagnosed the board and replaced a transister for $1.50 which fixed the problem on mine. The speed sensor I think gets the feedback which runs to the board and tells the fuel solenoid when to open and close.

I don't think the an emssions board would cause the fuel solenoid to block flow unless the voltage was weak not allowing the solenoid to open fully. The board sends a voltage to either close or open it. Maybe the solenoid is not opening all the way. Have you tried replacing it?

If you really think it is the board pull it out and take a good look at it. Chances are it will be burnt were the component failed. I can test it for you if you want to send it to me.

Goodluck
 
Joined
Jul 20, 2003
Messages
1,846
You might still have problems w/o the solenoid operating properly. Check eBay as they come up really cheap there sometimes (I sold 2 for something like $5 each).
 

60wag

SILVER Star
 
Joined
Jun 25, 2003
Messages
1,929
Location
Boulder, CO
The fuel cut solenoid only shuts off fuel to the idle circuit in the carb. If your engine cuts out while running above idle, the problem is elswhere. Its pretty easy to temporarily hot wire the idle solenoid to see if it helps your problem but I'll bet it doesn't.
 
Joined
Jul 20, 2003
Messages
1,846
On an FJ60 it's behind one of the kick panels (can't remember which side).

Sure you have an 87 62?
 

lovetoski

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Joined
Jul 13, 2003
Messages
4,628
Live to Ski said:
what exactly is the "kick panel"?
It's the panel under the dash, right by your outboard foot. If in the passenger side, it's right next to the right foot. You can "kick" it with your foot - sideways. The computer on an fj60 is in the PS kick panel.
 
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