OOps, yes it does
JR North wrote:


> This car does NOT have KNS

 

OOps, yes it does
JR North wrote:


> This car does NOT have KNS

 

OOps, yes it does
JR North wrote:


> This car does NOT have KNS

 

I would be suspecting a bad hall sensor in the distributor. They can be
intermittent like you describe.

Another longer shot would be an intermittent failure of the fuel pump relay but
this wouldn't throw the fault codes you are finding.

JR North wrote:
> Thanks, guys so far-
> The driveability issues are:
> Intermittently loses trigger to ignition module-engine stumbles/dies
> Intermittently pulls DPR to +12v-no current modulation-rough idle
> intermittent No response to ECT input-tests ok, then later fault appears
> The engine runs perfect when faults not present
> This car does NOT have KNS
> Does have body-colored spoiler
> JR
>
> JR North wrote:
>
>> 7/87 production date. 2.3 5 cyl. CIS-EIII. The Bentley '84-'87 Coupe
>> GT manual does not show this car with CIS-EIII System. The manual
>> shows all with 25 pin ECM. This car has 35 pin ECM. The '88-'90 Audi
>> 80/90 Bentley manual shows CIS-EIII for 5 cyl., but the pin-outs and
>> wire colors don't match. The '87 Audi 5000 Bentley manual-same
>> problem. A call to the local Audi dealer Service-dead end. No
>> supplemental service manuals for '87 Coupe GT w/ CIS-EIII. The car has
>> serious drivability issues related to engine management, but without
>> correct schematic diagnosis will be very difficult.
>> Any Ideas?
>> JR
>
>
>

 

I would be suspecting a bad hall sensor in the distributor. They can be
intermittent like you describe.

Another longer shot would be an intermittent failure of the fuel pump relay but
this wouldn't throw the fault codes you are finding.

JR North wrote:
> Thanks, guys so far-
> The driveability issues are:
> Intermittently loses trigger to ignition module-engine stumbles/dies
> Intermittently pulls DPR to +12v-no current modulation-rough idle
> intermittent No response to ECT input-tests ok, then later fault appears
> The engine runs perfect when faults not present
> This car does NOT have KNS
> Does have body-colored spoiler
> JR
>
> JR North wrote:
>
>> 7/87 production date. 2.3 5 cyl. CIS-EIII. The Bentley '84-'87 Coupe
>> GT manual does not show this car with CIS-EIII System. The manual
>> shows all with 25 pin ECM. This car has 35 pin ECM. The '88-'90 Audi
>> 80/90 Bentley manual shows CIS-EIII for 5 cyl., but the pin-outs and
>> wire colors don't match. The '87 Audi 5000 Bentley manual-same
>> problem. A call to the local Audi dealer Service-dead end. No
>> supplemental service manuals for '87 Coupe GT w/ CIS-EIII. The car has
>> serious drivability issues related to engine management, but without
>> correct schematic diagnosis will be very difficult.
>> Any Ideas?
>> JR
>
>
>

 

I would be suspecting a bad hall sensor in the distributor. They can be
intermittent like you describe.

Another longer shot would be an intermittent failure of the fuel pump relay but
this wouldn't throw the fault codes you are finding.

JR North wrote:
> Thanks, guys so far-
> The driveability issues are:
> Intermittently loses trigger to ignition module-engine stumbles/dies
> Intermittently pulls DPR to +12v-no current modulation-rough idle
> intermittent No response to ECT input-tests ok, then later fault appears
> The engine runs perfect when faults not present
> This car does NOT have KNS
> Does have body-colored spoiler
> JR
>
> JR North wrote:
>
>> 7/87 production date. 2.3 5 cyl. CIS-EIII. The Bentley '84-'87 Coupe
>> GT manual does not show this car with CIS-EIII System. The manual
>> shows all with 25 pin ECM. This car has 35 pin ECM. The '88-'90 Audi
>> 80/90 Bentley manual shows CIS-EIII for 5 cyl., but the pin-outs and
>> wire colors don't match. The '87 Audi 5000 Bentley manual-same
>> problem. A call to the local Audi dealer Service-dead end. No
>> supplemental service manuals for '87 Coupe GT w/ CIS-EIII. The car has
>> serious drivability issues related to engine management, but without
>> correct schematic diagnosis will be very difficult.
>> Any Ideas?
>> JR
>
>
>