Got this old truck from a friend nothing worked you guys have talked me through trans problem an getting it running so far i think i got off cheap thanks to all the help from you guys on the forum I cant thank you enough . Started with 7 different codes have eliminated all but these two . Truck starts good an runs good until warmed up according to temp guage in truck then boggs an wants to die an if it does hard to start. I mean its going along fine an just starts surging an if i give it more fuel it gets worse just put it in nuetral an hope it starts to idle ok then its ok for a few minutes then boggs again. I got code 34 an 44 EGr position sensor or pressure feedback egr pfe sensor signal voltage out of self spec limits. an 44 problems in thermactor air control system. Would these codes cause the bogging. I got the truck with no air pump so i bought one an put it on can i just take it off an plug the two hoses coming out of back of engine will this tell me if the problems are with emmissions. It sure feels like not getting fuel but no codes showing that. all input will be greatly welcome Im almost there i think. Thanks Dan The egr valve is rusted on the pipe so i cant see if its working any ideas.

 

Here a list of codes I found for 85 to 86. Hope it helps you out now and in the future.
Code 11-System pass

Code 12-RPM unable to reach upper test limit

Code 13-RPM unable to reach lower test limit

Code 14-Pip circuit failure

Code 15-ECA read only memory test failed

Code 15-ECA keep alive memory test failed

Code 16-IDM signal not received

Code 18-SPOUT circuit open or spark angle word failure

Code 18-IDM circuit failure or SPOUT circuit grounded

Code 19-Failure in ECA internal voltage

Code 21-ECT out ot self test range

Code 22-BP sensor out of self test range

Code 22-BP sensor or MAP out of range

Code 23-TP sensor out of self test range

Code 24-ACT sensor out of self test range

Code 25-Knock not sensed during dynamic test

Code 26-VAF/MAF out of self test range

Code 26-TOT out of self test range

Code 26-TOT sensor out of self test range (E-400)

Code 28-Loss of IDM, right side

Code 29-Insufficient input from vehicle speed sensor

Code 31-PFE, EVP or EVR circuit below minimum voltage

Code 32-EVP voltage below closed limit

Code 33-EGR valve opening not detected

Code 34-EVP voltage above closed limit

Code 35-PFE or EVP circuit above closed limit

Code 41-HEGO sensor circuit indicates system lean

Code 41-No HEGO switching detected

Code 42-HEGO sensor circuit indicates system rich

Code 44-Thermactor air system inoperative-right side

Code 45-Thermactor air upstream during self test

Code 45-Coil 1,2 or 3 failure

Code 46-Thermactor air not bypassed during self test

Code 47-4WD switch closed (E40D)

Code 48-Loss of IDM, left side

Code 49-1-2 shift error (E40D)

Code 51-ECT/ACT reads -40°F or circuit open

Code 52-Power steering pressure switch circuit open

Code 52-Power steering pressure switch always open or closed

Code 53-TP circuit above maximum voltage

Code 54-ACT sensor circuit open

Code 56-VAF or MAF circuit above maximum voltage

Code 56-TOT reads -40°F or circuit open (E40D)

Code 59-2-3 shift error (E40D)

Code 61-ECT reads 254°F or circuit grounded

Code 63-TP circuit below minimum voltage

Code 64-ACT sensor grounded or input reads 254°F

Code 65-Overdrive cancel switch open, no change seen (E40D)

Code 66-MAF sensor input below minimum voltage

Code 66-TOT grounded or reads 290°F (E40D)

Code 67-Neutral/drive switch open or A/C on

Code 67-Clutch switch circuit failure

Code 67-MLP sensor out of range or A/C on (E40D)

Code 69-3-4 shift error

Code 72-Insufficient MAF/MAP change during dynamic test

Code 73-Insufficient TP change during dynamic test

Code 74-Brake on/off switch failure or not actuated

Code 77-Operator error

Code 79-A/C on during self test

Code 79-A/C or defrost on during self test

Code 81-Air management 2 circuit failure

Code 82-Air management 1 circuit failure

Code 84-EGR vacuum solenoid circuit failure

Code 85-Canister purge solenoid circuit failure

Code 86-Shift solenoid circuit failure

Code 87-Fuel pump primary circuit failure

Code 88-Loss of dual plug input control

Code 89-Converter clutch solenoid circuit failure

Code 91-Shift solenoid 1 circuit failure (E40D)

Code 92-Shift solenoid 2 circuit failure (E40D)

Code 93-Coast clutch solenoid circuit failure (E40D)

Code 94-Converter clutch solenoid circuit failure (E40D)

Code 95-Fuel pump secondary circuit failure- ECA to ground

Code 96-Fuel pump secondary circuit failure-battery to ECA

Code 97-Overdrive cancel indicator light-circuit failure(E40D)

Code 98-Electronic pressure control driver open in ECA (E40D)

Code 98-Hard fault present

Code 99-Electronic pressure control circuit failure (E40D)

Code 111-System pass

Code 112-ACT sensor circuit grounded or reads 254° F

Code 113-ACT sensor circuit open or reads -40° F

Code 114-ACT outside test limits during KOEO or KOER tests

Code 116-ECT outside test limits during KOEO or KOER tests

Code 117-ECT sensor circuit grounded

Code 117-ECT sensor circuit below minimum voltage or reads 254°F

Code 118-ECT sensor circuit open

Code 118-ECT sensor circuit below maximum voltage or reads -40°F

Code 121-Closed throttle voltage higher or lower than expected

Code 122-TP sensor circuit below minimum voltage

Code 123-TP sensor circuit below maximum voltage

Code 126-BP or MAP sensor higher or lower than expected

Code 128-MAP vacuum circuit failure

Code 129-Insufficient MAF or MAP change during dynamic responded test

Code 144-No HEGO switching detected

Code 167-Insufficient TP change during dynamic response test

Code 171-Fuel system at adaptive limit, HEGO unable to switch

Code 172-HEGO shows system always lean

Code 173-HEGO shows system always rich

Code 174-HEGO switching time is slow

Code 179-Fuel at lean adaptive limit at part throttle; system rich

Code 181-Fuel at rich adaptive limit at part throttle; system lean

Code 182-Fuel at lean adaptive limit at idle; system rich

Code 183-Fuel at rich adaptive limit at idle; system lean

Code 211-PIP circuit fault

Code 212-Loss of IDM input to ECA or SPOUT circuit grounded

Code 213-Spout circuit open

Code 224-Erratic IDM input to processor

Code 225-Knocked not sensed during dynamic response test

Code 311-Thermactor air system inoperative

Code 312-Thermactor air upstream during self test

Code 313-Thermactor air not bypassed during self test

Code 327-EVP or DPFE circuit below minimum voltage

Code 328-EGR closed voltage higher than expected

Code 332-Insufficient EGR flow detected

Code 334-EGR closed voltage higher than expected

Code 337-EVP or DPFE circuit above maximum voltage

Code 411-Cannot control rpm during KOER low rpm check

Code 412-Cannot control rpm during KOER high rpm check

Code 452-Insufficient input from vehicle speed sensor

Code 511-EEC processor ROM test failed

Code 512-EEC processor Keep Alive Memory test failed

Code 513-Failure in EEC processor internal voltage

Code 519-Power steering pressure switch circuit open

Code 521-Power steering pressure switch did not change state

Code 525-Vehicle in gear or A/C on during self test

Code 536-Brake on/off circuit failure, switch not actuated during KOER test

Code 538-Insufficient RPM change during KOER dynamic response test

Code 538-Operator error

Code 542-Fuel pump secondary circuit failure: ECA to ground

Code 543-Fuel pump secondary circuit failure: Battery to ECA

Code 552-Air management 1 circuit failure

Code 553-Air management 2 circuit failure

Code 556-Fuel pump primary circuit failure

Code 558-EGR vacuum regulator circuit failure

Code 565-Canister purge circuit failure

Code 569-Canister purge 2 circuit failure

Code 617-1-2 shift error (E40D)

Code 618-2-3 shift error (E40D)

Code 619-3-4 shift error (E40D)

Code 621-Shift solenoid 1 circuit failure

Code 622-Shift solenoid 2 circuit failure

Code 624-EPC solenoid or driver circuit failure

Code 625-EPC driver open in ECA

Code 626-Coast clutch solenoid circuit failure (E40D)

Code 627-Converter clutch solenoid circuit failure (E40D)

Code 628-Converter clutch error (E40D)

Code 629-Converter clutch control circuit failure

Code 631-Overdrive cancel indicator light circuit failure

Code 632-Overdrive cancel switch not changing states (E40D)

Code 633-4WD switch is closed

Code 634-MLP sensor voltage out ot self test range, A/C on

Code 636-TOT sensor voltage out of self test range

Code 637-TOT sensor circuit above maximum voltage

Code 638-TOT sensor circuit below minimum voltage

Code 654-MLP sensor not in park position

Code 998-Hard fault present

 

Check your TAB and TAD solenoids on the passenger side wheel well for voltage and holding vacuum, you also have an EGR solenoid there too.You can also check your bypass and diverter valves with a vacuum pump to see if they hold.

griff777

 

Thanks I checked the EVP sensor an it was bad replaced it it runs better but still have both codes . Gittin there slow but sure. What i want to know could these codes make it run that bad or could i be working on the wrong thing if there are no ignition codes or fuel does that mean everyrhing is ok. Dan

 

Check your fuel pressure at the schrader valve on the fuel rail. Based on your description, it sounds like you have a loaded filter somewhere in the fuel system. Maybe the dual-function reservoir, it seems to be pretty vulnerable to bad gas loading up its internal filter (I had this same problem on my old '86 because the foam filter on the in-tank pump fell apart and got into the fuel lines!). It was an expensive dealer-only part when I was having the problem, so I just bypassed it with a couple pieces of fuel line. Made for hard starting when parked uphill, unless I primed it by turning the key to ON position 10 times to prime it!

-Chris

 

Front tank is leaking fuel can i just remove it an run off rear tank. Thanks Dan

 

I'm only using 1 tank right now myself. What you have to do is put a piece of 3/8 fuel line hose with two clamps on the reservoir where your fuel and return lines connect to it. While your there check the filter in the reservoir if you hav'nt already. The bottom of it unscrews like an oil filter. You will probably need a strap type oil filter remover.
Griff777