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Old 07-24-2018, 03:25 AM   #17491
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Originally Posted by cadillacdude1975 View Post
her Lexus has a self diagnosing system. the ECM does all the work. i depress and hold two buttons then turn the key on engine off and read the climate control display for codes. now dash work on that car or any new one would be a nightmare.
On the mid to late 80s Cadillacs, this is how you read the trouble codes from the ECM. Would blow people's minds when I'd do that.
Remember, if you convert an R12 system to 134, undercharge the system by 15%.
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Old 07-24-2018, 03:37 AM   #17492
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On the mid to late 80s Cadillacs, this is how you read the trouble codes from the ECM. Would blow people's minds when I'd do that.
Remember, if you convert an R12 system to 134, undercharge the system by 15%.
Chrysler products with a digital odometer have a similar trick where you turn the key on and off 3 times but don't start it. The odometer will read out the codes. It works for 96-up with OBD2, not sure about earlier models.
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Old 07-24-2018, 03:55 AM   #17493
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Chrysler products with a digital odometer have a similar trick where you turn the key on and off 3 times but don't start it. The odometer will read out the codes. It works for 96-up with OBD2, not sure about earlier models.
Earlier models would blink out the code on the CEL - like the GM vehicles do if you jump the pins in the diagnostic connector.
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Old 07-24-2018, 03:58 AM   #17494
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Earlier models would blink out the code on the CEL - like the GM vehicles do if you jump the pins in the diagnostic connector.
My old honda would do that...there was a little connector under the dash you could jump with a paper clip. Don't even get me started on Ford EEC-IV, lol.
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Old 07-25-2018, 06:08 AM   #17495
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Called the parts house this morning to get an AC drier, but their local distro didn't have it in stock so it was gonna take a couple days. Remembered I bought an all-in-one can of R134a with the oil and seal sweller and a little psi gauge on top a couple years ago, Dug it up and decided to just give it a go. Charged it up and the AC belt squealed like a motherfucker. No AC has actually been a bit of trade off since that was the only noisy V belt.


Shit felt great!!!




Until evening time...


Then the refrigerant must've pissed out. Well that was fun while it lasted. Gonna go through and replace all the o-rings and drier like I'd planned. For whatever reason I could find that old ass can of 134, but the PAG oil and tap valve I bought last summer are MIA. At least the compressor and clutch are good.
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Old 07-25-2018, 03:00 PM   #17496
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Saving up to buy a house so I had to sell one. The 91 Chevy C1500 has gone to a new home. Here's a burnout pic from last summer.


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Old 07-25-2018, 03:52 PM   #17497
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My old honda would do that...there was a little connector under the dash you could jump with a paper clip. Don't even get me started on Ford EEC-IV, lol.
this is how OBD 1 cars do it
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Old 07-25-2018, 05:50 PM   #17498
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Got the glove box cleaned up and reinstalled from when I pulled the dash long ago.
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Old 07-25-2018, 06:32 PM   #17499
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The ford eec4 was complete shit.

Changed the ignition coil (31 year old oem was still in the truck) and several vacuum lines. I did have a vac leak from the front port on the intake. It is running much better now. There is still an intermittent surge that feels ignition related. I have another set of wires, I think I will replace them this weekend. I need to get a white crayon and mark the balancer so I can be sure the timing is correct since I changed the distributor. I still have a few more vac lines to change. I think all the years of doing nothing but driving it everyday is starting to show all at once.
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Old 07-25-2018, 08:28 PM   #17500
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The ford eec4 was complete shit.

Changed the ignition coil (31 year old oem was still in the truck) and several vacuum lines. I did have a vac leak from the front port on the intake. It is running much better now. There is still an intermittent surge that feels ignition related. I have another set of wires, I think I will replace them this weekend. I need to get a white crayon and mark the balancer so I can be sure the timing is correct since I changed the distributor. I still have a few more vac lines to change. I think all the years of doing nothing but driving it everyday is starting to show all at once.
Yeah it sucks. I'm also pretty sure they source their vacuum lines from the same plastics company that makes those flimsy little straws you stir your coffee with. On Fords with no cel you actually have to use a test light to blink out the codes. You also have to use a bit of common sense because it will throw codes for things that would normally read low without it running (ie TPS and coolant temp out of range when the engine is cold and not running, but sensors are totally fine).
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