Pure Stock-1995 Olds Achieva

[Robert Swartz]

Originally Posted by Ed Wright

If it's a flash memory computer, it will be called PCM. If your scanner clears codes, that will take care of it.

Thanks Ed. Yes, I pulled the PCM fuse. Did as you said. Switched the key on for a short time, switched back off, replaced the fuse. Plugged in my scanner and it's clear of codes. Car still runs crappy, LOL! I clumbsily;sic removed the injector clips, being old and very brittle, a couple broke and I need to fish out the clips. Pulling #'s 1 & 4, the car still runs, pulling #'s 2 & 3, the car starts to die. Have I got a couple of dead or clogged injectors?

[Ed Wright]

That would be hard to answer. If you have a local shop with a bench top injector cleaner I would pull them to have them cleaned. The better machines can also flow test them. Have you looked at the spark plugs yet?

[Robert Swartz]

Originally Posted by Ed Wright

That would be hard to answer. If you have a local shop with a bench top injector cleaner I would pull them to have them cleaned. The better machines can also flow test them. Have you looked at the spark plugs yet?

Don't know of a shop that can do this, yet? I pulled the plugs earlier in the week. They had the tan/grayish color of normal running plugs. They did appear very "wet" on the bottom threads. It's been started numerous times since then, who knows. A new set, once I determine the injector problems, will be in order.


Wonder if spraying the throttle body, I've dislodged some gunk? The rough running started after I did that. Looks like I have more work ahead of me.

[Ed Wright]

Good chance you did, most likely coated the plugs with that crap you sprayed in the throttle body. Screw a set of plugs in it, and your dead cylinders will probably go away.

[Tod Lane]

Originally Posted by Robert Swartz

Thanks Ed. Yes, I pulled the PCM fuse. Did as you said. Switched the key on for a short time, switched back off, replaced the fuse. Plugged in my scanner and it's clear of codes. Car still runs crappy, LOL! I clumbsily;sic removed the injector clips, being old and very brittle, a couple broke and I need to fish out the clips. Pulling #'s 1 & 4, the car still runs, pulling #'s 2 & 3, the car starts to die. Have I got a couple of dead or clogged injectors?

Bob
Could be coil pack for 1-4 is bad. By removing the injectors in the firing cylinders (2-3) and the motor tried to die you still don't know why 1-4 aren't firing. Since the two dead cyls are paired on the coil pack it almost seems more likely its that. If it was say 1-2 that wern't firing you could rule out coil packs

I think Autozone can test coil packs

[Ed Wright]

Could be, strange that it happened when spraying the throttle body. Coincidences happen all the time.
Lots of shops with bench top injector cleaners/flow testers. I have mine done each winter. I numbered mine. I take an index card, numbered blanks 1 through 8, and Steve at Bob Creitz's old shop cleans, flow them and fills in the blanks. Sometimes he has to hit one or two a second time to get them back where they were. Money well spent with an EFI car.

[Tod Lane]

Originally Posted by Ed Wright

Could be, strange that it happened when spraying the throttle body. Coincidences happen all the time.
Lots of shops with bench top injector cleaners/flow testers. I have mine done each winter. I numbered mine. I take an index card, numbered blanks 1 through 8, and Steve at Bob Creitz's old shop cleans, flow them and fills in the blanks. Sometimes he has to hit one or two a second time to get them back where they were. Money well spent with an EFI car.

Point taken, but if Autozone will test for free I am thinking eliminate one possibility...

By the way, Robert and I appreciate all the help! This thing is driving us nuts

[Ed Wright]

Good luck.

[Robert Swartz]

Originally Posted by Tod Lane

Point taken, but if Autozone will test for free I am thinking eliminate one possibility...

By the way, Robert and I appreciate all the help! This thing is driving us nuts

X2

Yes, Ed, thank you very much.

What I'm happiest with, I finally found something that the car reacted to. It made a change. Which means I can start to isolate something. I went out and pulled the valve cover with the housing, coil packs and controler for the coil packs. I will take it by Advance tomorrow. I think they do electrical testing as well. I've been dealing with them quite a bit here lately.

If the coils and housing check out. We can say something isn't the problem. Then start to look at the things that could be contributing. Would've never dreamed I'd get into this much work for a "slow" car! Just have to chuckle, car seemed to run OK until I started working on it.

Anyway, Tod, we'll still have some work cut out for us Saturday.

[Robert Swartz]

Well, Autozone nor Advance Auto could test the coil packs. Only thing they could test was the ignition control. Car starts and runs, not the culprit.

Came back home and in a vain attempt, threw a new set of plugs in it. Started it, ran the same. Pulled both 1 and 4 injector clips, car still ran the same. Pulled the new plugs out, 1 and 4 never fired, 2 and 3 had a tannish color.

May pick up a housing and coil packs after work tomorrow.