1995 Geo pings when under heavy accel or hill

escapingoth · #1 11-27-2005, 05:09 PM

I have a Geo metro 1.0 with 178000k. I have replaced the plugs/wires rotor and timed. Before I replaced the above the car pinged alot but I was getting over 60 mpg. After I replaced the above and timed the engine gas mileage went down to under 50, but no pinging.
I started to think that the timing is not advancing under load. Has anyone else had this problem or similar symptoms. I am thinking that it might be the ignition control module, does anyone know how to check it.
I would appreciate any help.
Thanks

DieInterim · #2 11-27-2005, 06:07 PM

Quote:

Originally Posted by escapingoth

I have a Geo metro 1.0 with 178000k. I have replaced the plugs/wires rotor and timed. Before I replaced the above the car pinged alot but I was getting over 60 mpg. After I replaced the above and timed the engine gas mileage went down to under 50, but no pinging.
I started to think that the timing is not advancing under load. Has anyone else had this problem or similar symptoms. I am thinking that it might be the ignition control module, does anyone know how to check it.
I would appreciate any help.
Thanks

I have to ask... but when you performed the timing adjustment did you jumper the diagnostic connector before adjustment?

Blake

escapingoth · #3 11-27-2005, 10:57 PM

Quote:

Originally Posted by DieInterim

I have to ask... but when you performed the timing adjustment did you jumper the diagnostic connector before adjustment?

Blake

Hi Blake.
Thanks for responding.
No I seemed to have missed that part. I always seem to get a car that is in the middle of some change.
I have a Haynes manual and the picture of the Diagnostic connector is white with 4 female pins, that is suppose to be beside the ignition coil. The only connector that I can find is a black 4 pin connector with a small termination box on the end of it. It doesn't look like the one in the picture. In my book it's page 5-5.
Have you seen any other pictures on it.
Any suggestions.
Thanks

gumby_ct · #4 11-28-2005, 01:07 PM

Mine a 96 (CAN manuf. date 9/95) also pings when coming up my very steep hill. My book likely has the same pic but advises to find a decal under the hood (w/pinout). The decal has the Emission info on it. My connector is white or clear (6 pin) with a black rubber boot covering mounted to the firewall behind the drivers side strut.

I can't find my timing light to check it and was wondering if there is a way to use a simple test light like in days gone by?

Hope that helps.

ps. My brother-in-law mechanic says turn up the radio.
Gumby_CT

Crvett69 · #5 11-28-2005, 01:31 PM

depending on year of car you may not have to jump pins. if you have a 89-91? you might have vacuum advance, see if dist has 2 rubber hoses going to it. if it does you have to unhook them and plug the lines then set timing. when you hook them back up make sure you have them hooked to right spot on dist. if you hook them up backwards they won't work right

escapingoth · #6 11-28-2005, 11:07 PM

ps. My brother-in-law mechanic says turn up the radio.
Gumby_CT[/quote]

Hey Gumby, I like this suggestion. lol

There are two plugs directly behing the drivers strut mount. A smaller one and a larger one. Both are black, and both have rubber boots over them. (Boy is this starting to get frustrating.) After I remove a plug (looks like a termination cap) It has 4 female conectors on it when you remove a plug, these are the normal solderless conectors that are used in a lot of electrical conections.

As for your question, I don't know any other way other than using a timing light. Thanks for your help
Hans

escapingoth · #7 11-28-2005, 11:11 PM

Thanks for replying Crvett69.

There are only two wires coming out of the distributor. No hose and I know the plug that you are refering to not that either.

It seems like everyone else has a white plug and the only ones I can find are black ones. I don't know I starting to think I might be color blind. lol

Hans

gumby_ct · #8 11-29-2005, 02:36 AM

Hans, Just as you described -
Mine has 2 also but it is the smaller one I think you want. Does it look like the 4 pin described in the book? With the boot removed. Did you find a decal under the hood?

Mine also has the solderless female pins. Not sure what the extra 2 pins are for.

I think you are there.
Gumby_CT

escapingoth · #9 11-29-2005, 09:52 PM

Yep. That's the one. Mine doesn't look like the one in the Haynes book though. Surprise surprise.

I went to a mechanic today and he showed me the one. Mine has a 6 pin plug with 5 pins with connectors in it.

I will time the car tomorrow and hopefully that is all it is.
I was doing some checking at a few autoparts stores today to see if they could test the ignition control module, there had been a previous post that someone was having problems with theirs and they were able to get it tested. No such luck though.

Thank you for your help.

Have you ever had problems with your valve cover gasket leaking up by the timing belt cover. I have changed the gasket and it still leaks.

Hans

corning_d3 · #10 11-30-2005, 12:02 AM

Does that car have a knock sensor? The only way to stop pinging is to retard timing..

gumby_ct · #11 11-30-2005, 12:12 AM

I told ya, you were there. Congrats. You da maan!!
Keep us posted. I haven't timed mine yet - but I am sure someone here can help.
Gotta either find my light or a way to do it statically.

Quote:

Originally Posted by escapingoth

Have you ever had problems with your valve cover gasket leaking up by the timing belt cover. I have changed the gasket and it still leaks.

Hans

No - not yet. Maybe not enuff miles?
Right now I just keep it snug.
Good Luck

DieInterim · #12 12-02-2005, 03:45 PM

Quote:

Originally Posted by escapingoth

Yep. That's the one. Mine doesn't look like the one in the Haynes book though. Surprise surprise.

I went to a mechanic today and he showed me the one. Mine has a 6 pin plug with 5 pins with connectors in it.

I will time the car tomorrow and hopefully that is all it is.
I was doing some checking at a few autoparts stores today to see if they could test the ignition control module, there had been a previous post that someone was having problems with theirs and they were able to get it tested. No such luck though.

Thank you for your help.

Have you ever had problems with your valve cover gasket leaking up by the timing belt cover. I have changed the gasket and it still leaks.

Hans

I am glad you were able to locate the connector. So how is it now; still pings?

escapingoth · #13 12-02-2005, 07:50 PM

That crazy connector. I was able to see a firefly pre 95, and noticed that there was only one connector on it.

I just drove it about 1400km. Still pings but not as bad. I put a fuel injector cleaner in the last tank, we'll see how that goes. Anyway I'm back home now and able to do a little more on in it. I will play around on the timing and see if I can't get the max amount of pwr with the least amt of pinging.

Hans

corning_d3 · #14 12-02-2005, 07:59 PM

If you want to get rid of the pinging, retard the timing a few degrees..

DieInterim · #15 12-03-2005, 12:26 PM

Quote:

Originally Posted by escapingoth

That crazy connector. I was able to see a firefly pre 95, and noticed that there was only one connector on it.

I just drove it about 1400km. Still pings but not as bad. I put a fuel injector cleaner in the last tank, we'll see how that goes. Anyway I'm back home now and able to do a little more on in it. I will play around on the timing and see if I can't get the max amount of pwr with the least amt of pinging.

Hans

Are you sure of the fuel you use?

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