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Originally Posted by 94greenGA_GT
Thanks so much for your reply!
My OBDI connector has only 3 wires, and doesn't read codes when i ground pin A (top right) out. So there may be something wrong with my ECU.
The radiator cracked today. So now I will have to fix that as well.
Randomly my grand am starting running. It will only run without misfiring above 2000 RPM. It likes to die at anything below 1000. THe spark plug look like crap, but i don't see how to change the rear cylinder bank plugs. They are tucked way back there.
A new radiator is $187, and I have no clue why it is running like shit. Would you bother trying to fix this car?
Joey
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You're welcome !
Heres a pick of the Assembly Line Diagnostic Link (ALDL) connector or Data Link Connector (DLC).
This is how I check trouble codes, they can be read by grounding test terminal
B. The terminal is most easily grounded by connecting it to terminal
A (internal ECM ground). This is the terminal to the right of terminal B on the top row of the ALDL connector.
Once the terminals have been connected, the ignition switch must be moved to the ON position with the engine not running.
The Service Engine Soon or Check Engine light should be flashing. If it isn't, turn the ignition OFF and remove the jumper wire. Turn the ignition ON and confirm that light is now on. If it is not, replace the bulb and try again. If the bulb still will not light, or if it does not flash with the test terminal grounded, the system should be diagnosed by an experienced technician. If the light is OK, proceed as follows.
The codes stored in memory may be read through counting the flashes of the dashboard warning lamp. The dash warning lamp should begin to flash Code 12. The code will display as one flash, a pause and two flashes. Code 12 is not a fault code. It is used as a system acknowledgment or handshake code, its presence indicates the PCM can communicate as requested. Code 12 is used to begin every diagnostic sequence. Some vehicles also use Code 12 after all diagnostic codes have been sent.
After Code 12 has been transmitted 3 times, the fault codes, if any, will each be transmitted 3 times. The codes are stored and transmitted in numeric order from lowest to highest.
The order of codes in the memory does not indicate the order of occurrence.
If there are no codes stored, but a driveability or emissions problem is evident, the system should be diagnosed by an experienced technician.
If one or more codes are stored, record them.
Switch the ignition OFF when finished with code retrieval or scan tool readings.
Get the codes if thier is any nad I can tell you what they are.
You can get to the back plugs, you just hav to do them blind so to speak.
Using A short extention will usually help reach them.
A lot of folks us a swivle type deal but I always break the plugs when I us them.
As far as fixing it or not thats really up to.
IF you hav another car, or the money to replace it, then you could part with it.
Your troubles could be as simple as new fuel filter and plugs and wires.
THose are pretty cheap parts that need replaced more often then most people do.
And when thier not maintained,
you end up with problems .