lca13's 93 California VX Thread - Page 3 - Fuelly Forums

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Old 06-03-2007, 11:14 AM   #21
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Yeah I know, but they spin much free'er without the calipers in place :-)

HELP!... me with my wiring.... I am down to verifying where the 2 O2 signals go to.... pls. see my other threads.
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Old 06-03-2007, 01:02 PM   #22
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For the 5wire....you can de-pin the 4 wire connector and pin them into the 5 wire connector since you will be re-using the O2 signal, ground and for sure the heater and heater ground. You will more than likely have to run a wire or two from the connector to the ECU for the calibration resistor.

I am emailing you the schematics to show the differences.
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Old 06-03-2007, 05:06 PM   #23
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Holy moly thank you! Taking a test run now.... no CEL so far.
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Old 06-03-2007, 09:00 PM   #24
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Runs fine exept when it seems to fall into lean burn, then the injectors seem like they are randomly miss firing.... the car fights to maintain speed... drops slowly, then it seems like the lean burn mode quits and the engine goes back strong..... repeat for 67 miles and also saw a big mpg drop... from solid 50's to 40. hmmmm
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Old 06-03-2007, 09:13 PM   #25
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hmmmm, looking at the 49 state versus CA schematic... perhaps I am missing something else.... like and EGR valve :-) Still researching.
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Old 06-04-2007, 08:30 AM   #26
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Missing EGR could cause some issues. I'm kind of surprised that the ECU hasn't thrown a code for the missing EGR lift sensor if you don't have one.

I still think a picture of your engine specifically where the EGR Valve would be would help.
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Old 06-04-2007, 09:27 AM   #27
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The schematic doesn't show the EGR, but I think it is there.... the Helms does not indicate a lack of EGR on CA VX's... and I think I still know what an EGR looks like, even after all these years :-)

I am gonna verify the EGR to ECU mappings to make dang blang sure and then start monitoring the lean burn voltage differentials to see what that shows.... a too lean mixture to ignite 25% of the time would describe the symptoms exactly. :-)
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Old 06-04-2007, 09:34 AM   #28
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EGR there in the middle I believe....
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Old 06-04-2007, 11:02 AM   #29
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Yup, EGR is there. I'll send you the other pages of the diagrams with the EGR wiring in there to help out.
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Old 06-04-2007, 04:18 PM   #30
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OK, I think I am down to ground issues.

When I had the Heater ground going to chassis ground, things ran real rough at lean burn

I now have the heater ground going to D22, along with the other wire.... Running much better.

But, the volt differentials between D8 D16 D18 are much broader than liste previously so I believe my ground situation still is not right.

The other thing that is interesting is the D22, D3 connections... which basically puts a resistor (in the harness) in between the 2.... that obviously affects that actual potential of the d22 ground with respect to chassis ground....

more playing around and reading... but HELP if anyone can simply solve this for me.... i am real close.
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