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Is it only the idle that is of concern at this point -- it runs fine off idle -- no black smoke -- no 6MPG? if so -- focus on the idle circuit The idle circuit on the e4me is controlled by the computer using a the Mixture solenoid and the idle air bleed plunger. You can see the plunger...

now that I look at it more -- the white connector looks like it goes to the light on the hood. Is that bundle in the driverside just above the wheel well? oh well -- in any case I will look this weekend.

The green wire on your first picture is used to test the dwell reading on the solenoid control of your carb. Under normal circumstances it is NOT connected to anything. All the connections on your carb look fine to me. I think the white connector is for the coolant sensor as mentioned...

As I understand it -- the 1981 is restricted mainly because of the heads and exhaust. Changing either or both of them should not effect the ECM. Remember that the E4ME only controls the mixture in the primary circuit -- WOT or near WOT is controlled in the secondary circuit the same as any...

Retrieve the ECM codes, it will tell you what senso ro actuator is at fault and you can debug the problem to the correct part. True that the coolant sensor can cause the ECM to go open loop, but there are many other things. Learn about the 1981,82 ECM, it is not that scary and can give you...

The procedure that he gave you MIGHT make the car idle better, but only if the idle air valve is adjusted correctly as I described above. If not, they will probably make little difference, and your issue is not in the idle circuit in the first place. You can get the CCC codes from the...

The e4me carb (1981 OEM model) does not adjust like prior year Quadrajets. The computer measures the fuel mixture from the O2 sensor and then adjusts the carb appropriately. This works very well when it works -- it goes full rich when it doesnt (that is why people are telling you to see what...

But the car did NOT run fine. 6 MPG is not right. The carb will go open loop if the ECM is unhappy. Open loop is a full rich condition with no timing advance which may be the cause of the MPG issue and needs to be addressed for the 81 is to ever work well. You need to go through the debug...

With all of this going on, are you getting an check engine lights and codes?

Even better -- why does he think there is something wrong with the computer -- was there a check engine light on constantly -- could you get the 12 code when the test lead was shorted or did nothing happen. Did he get to a "fried computer" using the proper corrective actions from the corvette...

I have always wondered what that connector was for:ugh!!!! Thanks -- I will let you know how it goes

Hi all Just rebuilt my E4ME, mainly because it was sitting on my car without running for about 10 years. I started it this weekend and the choke worked fine, but when it opened it would not idle, I slowly adjusted the idle air bleed valve and to my surprise, the engine began to idle as...