JohnnyWadd Posted December 11, 2012 Report Share Posted December 11, 2012 (edited) Hey everyone i finally got into the gm mas game. I have a car i am trying to get running. Its running very rich. Just saying hi and posting up what i have in hopes for some quick help.The mas install was done by previous owner and was said to have ran great at one time. So far it looks like the ignion system is good, timing is right, wires and plugs and good, vac advance is good, coil is new upgrade, no vacum leaks...good compression. Car barely runs and idles like a v8 with a big cam. It will start right up but dies under throttle.Also weird it will idle with an injector disconnected better than if connected and will idle with either injector connected (maybe one is leaking enought to let it idle becuase i thought the 1989's secondary didnt come on till boostCar has a narrow band AFM that shows 18 plus at idleAnyway here is what i have...http://i1187.photobucket.com/albums/z388/starionkiller/1989%20conquest/th_2012-12-11115202.jpghttp://i1187.photobucket.com/albums/z388/starionkiller/1989%20conquest/th_2012-12-11115225.jpghttp://i1187.photobucket.com/albums/z388/starionkiller/1989%20conquest/th_2012-12-11113830.jpghttp://i1187.photobucket.com/albums/z388/starionkiller/1989%20conquest/th_2012-12-11114009.jpghttp://i1187.photobucket.com/albums/z388/starionkiller/1989%20conquest/th_2012-12-11074051.jpghttp://i1187.photobucket.com/albums/z388/starionkiller/1989%20conquest/th_2012-12-11115317.jpg Edited December 11, 2012 by JohnnyWadd Link to comment Share on other sites More sharing options...
StarquestRescue Posted December 11, 2012 Report Share Posted December 11, 2012 Sounds like you have injector problems. Throw the narrow band away. It will only waste your time. Wide bands are less than 200 bucks. Link to comment Share on other sites More sharing options...
StarquestRescue Posted December 11, 2012 Report Share Posted December 11, 2012 Edit, your picture shows a wide band gauge. Try turning the idle knob to the right.. But it sounds like there is something wrong you will not be able to tune around. Link to comment Share on other sites More sharing options...
JohnnyWadd Posted December 12, 2012 Author Report Share Posted December 12, 2012 Edit, your picture shows a wide band gauge. Try turning the idle knob to the right.. But it sounds like there is something wrong you will not be able to tune around. I got it to idle doing that. afr down to 12's. Now it has enough power to move. The wideband guage is there but i only see a stock oxygen sensor. Link to comment Share on other sites More sharing options...
StarquestRescue Posted December 12, 2012 Report Share Posted December 12, 2012 Did you look underneath and along the down pipe? Sounds like the wide band is working. Repeat the tests with disconnecting the injectors and see if it effects the idle? It should idle the same with the secondary disconnected. But will stumble if you kick the gas pedal. Disconnecting the primary it should promptly stall at idle. Link to comment Share on other sites More sharing options...
JohnnyWadd Posted December 12, 2012 Author Report Share Posted December 12, 2012 Did you look underneath and along the down pipe? Sounds like the wide band is working. Repeat the tests with disconnecting the injectors and see if it effects the idle? It should idle the same with the secondary disconnected. But will stumble if you kick the gas pedal. Disconnecting the primary it should promptly stall at idle. It stalls but takes a while and idles best with just the green injector plugged in. Unplugging the black injector instantly cleans up the idle. Plugging it back in almost make it stall. Cleaning the injectors i noticed my green injector is a "Python"And it does have a wideband downstream of the downpipe. Link to comment Share on other sites More sharing options...
StarquestRescue Posted December 12, 2012 Report Share Posted December 12, 2012 Try a know good set of injectors. Link to comment Share on other sites More sharing options...
JohnnyWadd Posted December 12, 2012 Author Report Share Posted December 12, 2012 Try a know good set of injectors. Will do. Too bad i sold all mine. Link to comment Share on other sites More sharing options...
Skullzaflare Posted December 12, 2012 Report Share Posted December 12, 2012 sounds like its running on a 86 ecu feeding both injectors lol Link to comment Share on other sites More sharing options...
JohnnyWadd Posted December 12, 2012 Author Report Share Posted December 12, 2012 (edited) sounds like its running on a 86 ecu feeding both injectors lol I thought that too. ECU is a 0197 part number i checked.I was reading the threads and looking at the wiring thinking somehting could have been wired wrong making the injectors both fire. All seems right thoug. Edited December 12, 2012 by JohnnyWadd Link to comment Share on other sites More sharing options...
Skullzaflare Posted December 12, 2012 Report Share Posted December 12, 2012 I thought that too. ECU is a 0197 part number i checked.I was reading the threads and looking at the wiring thinking somehting could have been wired wrong making the injectors both fire. All seems right thoug.check and make sure build is a 87 or newer, i think 87 ecu casing is the same as 86 and older, possible 86 internals? jump your fuel pump tester connector with the OVCP off, and check the injectors, slowly pinch the return fuel like with pliers, and see if you have any leaks also, google the part number on the pythons and see what size they are. i think they are the "reman" injectors summit sells for our car, like the python maf Link to comment Share on other sites More sharing options...
JohnnyWadd Posted December 12, 2012 Author Report Share Posted December 12, 2012 check and make sure build is a 87 or newer, i think 87 ecu casing is the same as 86 and older, possible 86 internals? jump your fuel pump tester connector with the OVCP off, and check the injectors, slowly pinch the return fuel like with pliers, and see if you have any leaks also, google the part number on the pythons and see what size they are. i think they are the "reman" injectors summit sells for our car, like the python maf ECU part number is a 88 or 89. I signed the light in there and didnt get any drips. Link to comment Share on other sites More sharing options...
Caliber308 Posted December 12, 2012 Report Share Posted December 12, 2012 (edited) check and make sure build is a 87 or newer, i think 87 ecu casing is the same as 86 and older, possible 86 internals? MD120197 is a 88/89 ECU. 1987 year models came with these ECU numbers:MD106394,MD111820,MD084852,MD071084.1986 year model ECUs: MD110007,MD101177,MD090798,MD110005,MD101175.MD110006,MD101176. 1986 ECUs:MD110007: 5-Speed, ESI. 2/86 to 5/86.MD101177: 5-Speed, ESI. 10/85 to 1/86.MD090798: 5-Speed, ESI. ----- to 9/85.MD110005: 5-Speed, LE. 2/86 to 5/86.MD101175: 5-Speed, LE. 6/85 to 1/86.MD110006: Auto, LE. 2/86 to 5/86.MD101176: 5-Speed, LE. 6/85 to 1/86 I987 ECUs:MD106394: 5-Speed,ESI. 6/86 to 5/87MD111820: 5-Speed/Auto, LE. 6/86 to 5/87MD084852: 5-Speed, ES,LS,LE.3/84 to-----.MD071084: 5-Speed, ES,LS,LE.6/83 to2/84. Bill Edited December 12, 2012 by Caliber308 Link to comment Share on other sites More sharing options...
DMNDSTAR87 Posted December 12, 2012 Report Share Posted December 12, 2012 maybe a bad MAS----I had one of mine go bad after less than 1000miles---gig out Link to comment Share on other sites More sharing options...
JohnnyWadd Posted December 12, 2012 Author Report Share Posted December 12, 2012 (edited) maybe a bad MAS----I had one of mine go bad after less than 1000miles---gig out No Edited December 12, 2012 by JohnnyWadd Link to comment Share on other sites More sharing options...
DMNDSTAR87 Posted December 12, 2012 Report Share Posted December 12, 2012 No just throwing the simple things out there---u said in post that wires/plugs are good so fouled plugs is out----looks like u should have kept a couple injectors to swap out for testing purposes---there is a green bulb and a red bulb on the translator---the green should be dimly lit when at idle i belive---if the translator sees an issue the red lite blinks----is that happening?gig out Link to comment Share on other sites More sharing options...
JohnnyWadd Posted December 12, 2012 Author Report Share Posted December 12, 2012 no lights at idle Link to comment Share on other sites More sharing options...
Skullzaflare Posted December 12, 2012 Report Share Posted December 12, 2012 no lights at idlethats normal, after you rev it or drive it, the green light will be blinking, which is it telling you no rpm signal detected, running limp mode.thats normal Link to comment Share on other sites More sharing options...
JohnnyWadd Posted December 13, 2012 Author Report Share Posted December 13, 2012 (edited) Here is my mas..http://i1187.photobucket.com/albums/z388/starionkiller/1989%20conquest/th_2012-12-12160837.jpghttp://i1187.photobucket.com/albums/z388/starionkiller/1989%20conquest/th_2012-12-12160704.jpg I lied about the plugs. Going of the old bosch plugs from the PO i thought plugs where good. Pulled out these autolights ...http://i1187.photobucket.com/albums/z388/starionkiller/1989%20conquest/th_2012-12-12154216.jpg That prompted a compression check with 90 psi cold on 3 , with #4 making 95 psi. I should have went through it before blaming my maf/translator. When running pulling the plug wires off 1 or 4 make no change in idle. Edited December 13, 2012 by JohnnyWadd Link to comment Share on other sites More sharing options...
obsolete Posted December 13, 2012 Report Share Posted December 13, 2012 Weird. That doesn't look like the common 3" GM MAF I'm used to seeing:http://i248.photobucket.com/albums/gg183/jakedasnake03/DSC01303.jpg Link to comment Share on other sites More sharing options...
obsolete Posted December 13, 2012 Report Share Posted December 13, 2012 Okay, I did a little research, that's a newer style plastic Delphi MAF: http://ls1tech.com/forums/pcm-diagnostics-tuning/1515344-new-delphi-ls1-maf-design.html I would recommend picking up one of the older style Delco MAFs pictured above, since that's what the translator was designed to work with. Link to comment Share on other sites More sharing options...
JohnnyWadd Posted December 13, 2012 Author Report Share Posted December 13, 2012 I heard that from someone else...mine is a ac delco 19171541 Link to comment Share on other sites More sharing options...
obsolete Posted December 13, 2012 Report Share Posted December 13, 2012 Okay, I did a little more research. RockAuto is selling those new plastic Delphi MAFs as a plug-n-play replacement for the older style MAF, with a 5-pin to 3-pin adapter (other two pins are for a built-in IAT. So, it should work fine. Link to comment Share on other sites More sharing options...
obsolete Posted December 13, 2012 Report Share Posted December 13, 2012 (edited) I heard that from someone else...mine is a ac delco 19171541"that's the part number of the 3.5" sensor. I just checked it against one I have here."-->http://www.fullthrot...p?t=6177&page=2 Is your MAFT set to 3.5" GM MAF? Edited December 13, 2012 by obsolete Link to comment Share on other sites More sharing options...
JohnnyWadd Posted December 13, 2012 Author Report Share Posted December 13, 2012 "that's the part number of the 3.5" sensor. I just checked it against one I have here."-->http://www.fullthrot...p?t=6177&page=2 Is your MAFT set to 3.5" GM MAF? I dont know what the settings are for 3.5 gm maf. It started out with the settings in this pic...http://i1187.photobucket.com/albums/z388/starionkiller/1989%20conquest/th_2012-12-11115202.jpg With those settings^^^ i was at 18 afr at idle. I adjusted them based on the pinned threads we have on the translator and got 11 or 12 at idle. Link to comment Share on other sites More sharing options...
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