QuestionMy son inherited a 1986 S10 Blazer, V6 2.8l, 4x4, AC, EFI dual Brl, 130kmls...
vin:1G8CT18RXG0157049
I've been wrenching on this vehicle since my wife received as hand down from father.. 80k mls
Items replaced:
Catalyst Converter, tail pipes, muffler
02 sensor
EGR valve
Fuel Tank(rusted out)
Fuel Pump(screen clean)
Fuel filter
Tank's fuel lines
Pump Relay
Started to replace sheet metal as project for 15 year old's first vehicle.. as project truck.. full frame better than unibody..
I went to move the beasty and it won't start. It will power up the pump relay, fuel rail charges, 2-EFI squirts fuel as ignition switch engages starter motor.. for about 4 second and STOPsss..
MAP sensor
TPS (Throttle Position Sensor)
plugs
Dist. cap & Rotor
Ign. Coil
Still will not start.... I tried to bypass fuel pump relay test point w/12vdc... engine still starts for 4 seconds and STOPs.
Looking though WEB and talking to Mr GoodWrenches at GM Dealers, have not come up with a solution to move vehicle...
Since fenders and wheel wells were off, battery was removed, which cleared computer... but it gave codes to replace EGR and MAP and BARO sensor, prior... I assume the BARO is also the MAP since I can't find a Barometric Sensor in the books..
The only other thing I can think of, is the oil pressure sending unit... but when the engine IS turning over and runs for 4 seconds, the oil gauge come up to mid-range(>32psi) so again I assume this might not be the gremlin, but is their another circuit that signals computer, the oil pressure is up or down... In the oil pressure sending unit.
Some WEB help forums claim to disconnect to see if this might get it to remain running? It looks like a "bear' to R&R... dive way job, no lift.
There is no fuel rail pressure test point so I can't test rail pressure..
The fuel regulator is ~$88 for the EFI, but I don't think this is the problem, either..
I tore the bottom of dash board apart(both sides) looking for the computer... This to see if, just cycling PROM and wire loom connector, might clear up problem... can't find it.. also the drivers side rocker panel and floor board was R&R'd (rust) so the computer isn't their.. lost some were in dash board.. went as far as radio, and glove box access door to HAVAC stuff.
help..
greg
AnswerOK, The ECM is on the passengers side behind the glove box under the carpet near the passengers foot area or it is behind the glove box up towards the inside of the windshield.
Find the ECM and get back to me at:
meperganfortis@msn.com
As I may have to send you some pictures and you can't on this web site. So E-mail me at the above e-mail address and I can send you pictures.
autohelp
meperganfortis@msn.com
