85 GT won’t run

Got a spare ignition module, or can you borrow one?

Yes, I know you have spark...  trust me....

When I had that problem the power sup. to the injectors had come unplugged at the harness plug by the battery.

It's a long shot put it's worth a try.

**I'm not that familiar with the 2.8L because I've not worked on one for a long time.**

It's not getting gas to the plugs, because it fires and runs when it does. So just slowly move from the tank to the engine checking every place you can for fuel movement. Check for old or plugged fuel filters, pinched fuel lines, etc. If your tank is rusty and you ran the car near empty, there could be a good deal of debris in everything.

I had an old Monte Carlo that I had to change the fuel filter twice a week to keep it running.


Edited by Matt

It's either spark, fuel or air.

Have you

1. Checked cap and rotor, wires?
2. Oxygen Sensor?
3. vacuum lines?

We'll beat this dammit! You just hang in there!


Edited by Matt

No, the O2 sensor is ignore by the ECM for the first 60 seconds after startup.

You have spark, you have timing, you have compression (since it runs on ether!).

I've seen a bad distributor ground kill cars.  They get corrosion between the base plate where your module goes, to the shaft/housing.  Quicky try - run a ground wire off the battery to one of your distributor cap screws.  Takes 30 seconds and eliminates that off the list.

You're down to fuel (since you replaced the ignition module). 
Check for +12V at the pink/wht & the pink wires on the connector going to your injectors (that 2 row semi fat one near the t-stat housing).

If you have power there (with the key on!), then...  and this one is semi risky...  run a wire off the green and blue wires on that same connector.  Every time you ground those, ALL your injectors will fire.  You have a choice - you can pull the intake (again...  I'm sure!) and then lift out the injector rail leaving it hooked up, then with the key on, TAP it to ground for a SPLIT SECOND and see if they all squirt, OR leave it all hooked up in place, and have someone crank the car while you again tap it QUICKLY to ground.  If the car starts and then dies, just keep quickly tapping it to ground in spurts to see if it will keep going.  DON'T hold it on ground for more than a tiny shot at a time or you'll flood the hell out of the engine, maybe hydro lock it, or burn out your injectors!  You've been warned....   ;)

Anyhow, if that checks out, ring out all the wires going from your distributor back to the ECM, then do the same with the injector harness.

You COULD have a foobarred ECM.  I've replaced only about 3 over the years, covering probably 100 cars.  But it does happen.

Just brainstorming...... I've got a battery charger hooked up to my battery while im trying to start. Would that have any affect? Would my alternator being dead have anything to do with it... like i said just brainstorming

you mentioned that you were getting spark,.

where did you check that????? did you check at the coil or at one of the spark plugs????

i ask because ive had a rotor short out on me. which means i had spark at the coil and goin into the dist cap but nothing coming out to the spark plug........ obviously the engine would not do anything.

i keep an extra rotor and cap in the trunk at al times!!!

just another thought......Marcel

i have had a new rotor short out on me after ten minutes of use

obviously a defect that doesnt happen too often

M

Dr. Fiero.....

I've found the reminantes of two hacked up security systems....

Could the immobilizers allow the car to start on the cold start injector and not the others?????

so weve ripped out the old alarm systems, biig pile btw....

checked the power to the ECM its good, signal from the distributer is getting to the ECM, spark is getting to all 6 plugs. I do have a 87 Gt ECM sitting here but thats all i know about it.... is it compatable the numbers all read,

the service number is 1227170

the number under that is 860022 M622503058

the barcode number under the little cover is 533014106006204

i heard something about an oil pressure sending unit sometimes causeing problems...