Oil Town XJ
NAXJA Forum User
- Location
- Edmonton, AB
will a aftermarket alternator for an 87-90 4.0 XJ work in my 94
-
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Alternator question
- Thread starter Oil Town XJ
- Start date
Oil Town XJ
NAXJA Forum User
- Location
- Edmonton, AB
Does anyone out there know if it will work because I can get a great deal on a used one
5-90
NAXJA Forum User
- Location
- Hammerspace
No. The 1990 and earlier (w/AMC or GM engine) used a Delco alternator, while the 1991-up (w/AMC engine) used a Nippondenso alternator.
The Delco is internally-regulated, while the Denso is regulated externally by the PCM.
And, I think they use different mount dimensions anyhow. Besides, bypassing the PCM regulator will throw a "hard" code (CEL/MIL lit,) which will fail you on emissions inspection anyhow.
If you want more power, you can get uprated Denso alternators without too much trouble - I've got a guy that does them (San Jose Generator - check him out on my site,) and I'm sure quite a few others do as well.
The Delco is internally-regulated, while the Denso is regulated externally by the PCM.
And, I think they use different mount dimensions anyhow. Besides, bypassing the PCM regulator will throw a "hard" code (CEL/MIL lit,) which will fail you on emissions inspection anyhow.
If you want more power, you can get uprated Denso alternators without too much trouble - I've got a guy that does them (San Jose Generator - check him out on my site,) and I'm sure quite a few others do as well.