Im stumped

[Brent]

Im stumped and pissed off. so thats not helping. Here it is car starts OK acceleratets sluggishly O2's - 840's let off the gas SES comes on scanmaster shuts off or has --- --- step on the brake ses goes off and scanmaster resets. NO codes


Idle
MAF 05
BLM 122
LV8 73 ????????
O2 CC's ok

off idle
MAF 07
BLM 114 (i think cell 5)
LV8 68 ?????????
O2 sensor is reading good through out

rev a little
MAF 10-12
BLM 124
LV8 77 ???????????

drive giving gas
MAF 112
BLM 132
LV8 252 WTF

and right when the scanmaster flips back on its reading 17+KR

It does still run while SES is on But is Dogging BAD. I have checked voltages. fixed some ify wires and fuselinks. I know im a hair low on FP Pluged Cat? EGR ECM Im lost

86 GS (mini GN) Engine LG3 3.8 HO "148" ECM stock. only mods late model Quick start type II Ignition and some TB stuff (can be seen in the T6P Library. all was running good Till the other day. Thanks guys

 

[Blown&Injected]

wonder if some wire for the scan tool is moving around under the dash near the brake peddle

 

[83ttypecooled]

Hi,
I think you have an ecm or connection problem,probably the ecm or prom.

 

[Brent]

Hi,
I think you have an ecm or connection problem,probably the ecm or prom.

BINGOThank you . I should have guessed it I must not have been thinking straight. I exchanged it for a spare ECM I had laying around. problem gone. Ill have to get a new one now.

 

[Brent]

Uff she runs really lean on the top end now. but no KR so I guess thats ok. 760's WOT. It wasnt a 148 ECM soo The program is probably for a smaller engine(HP) Hell, the scan master even works with it:biggrin: