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  #31  
Old 02-28-2009, 12:34 AM
pawoSD's Avatar
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Location: Grand Rapids, MI
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Your car being an '86 is a very early one....so it might or might not have a temp sensor at the rear of the engine that looks like this:



And has a big plug connected to it. Its a dual temp sensor. Tested in a cris-cross pattern. Each pin across from the other is the one to test with, not the ones next to each other.

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  #32  
Old 02-28-2009, 08:25 AM
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It is the green one...

I posted above. It only has two pin or connectors so I ammeasuring resistance between the two.
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  #33  
Old 02-28-2009, 02:51 PM
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IT IS ALIVE!!!!!!

I got in touch with Mark, one of the local MB owner, he let me borrow a coolant temperature sensor, an EZL and an ignition coil to trouble shoot.
I tried the sensor with no changes. Before I disconnected more cables to replace the EZL, I followed his advice and bought some starting fluid and tried to start the vehicle. The vehicle started and died as usual. I tried it a couple of more times and on the third time, the car did start and, even though it died...it lasted a few more seconds before it died. Based on that fact, I reviewed my notes to see what I had done in the past two months to the car that had to do with fuel. I then remember changing the EHA with a used one I had in my spare parts. I keep the old EHA...just in case. I changed the EHA and the car started right away and keep on running. I adjusted the duty cycle to around 55% and I drove around the neighborhood with no ill effects. Like I said before, I think I had two different problems and I hope between the EHA and the new CPS, both problems go away.
I know the EHA is part of the ignition/fuel regulating system but, preventing the car from starting...? Has anybody experienced this before...?
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Last edited by J.HIDALGO; 02-28-2009 at 03:54 PM.
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  #34  
Old 02-28-2009, 03:27 PM
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That’s great!

The EHA controls the fuel mixture by regulating the pressure differential between the upper and lower chambers of the fuel distributor. For emission reasons, it also turns off the fuel supply entirely when you lift your foot off of the gas at say 2000 + rpm and above and coast down to approx 1200 rpm where it will turn the fuel supply back on (rpm numbers are approximate and were changed during production). It appears that the CPS was your initial problem and the defective EHA valve you installed trying to cure the initial problem became your second problem. Mark
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  #35  
Old 02-28-2009, 03:51 PM
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Thanks Mark!

Hopefully, it will not die again. I sent you a PM.

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Last edited by J.HIDALGO; 02-28-2009 at 03:57 PM.
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