American Locomotive
New Member
- Messages
- 24
- Location
- USA
Hey guys, I've got a relatively low miles (~100,000) 1990 1UZ installed in a Jeep Cherokee with the Jeep AW4 automatic installed behind it (the AW4 is the same thing as an A340E, but uses an external transmission controller).
It starts up fine and great, high-idles at ~1200 RPM cold, and as the coolant temperature comes up the idle speed drops. Once it hits full operating temperature, the idle drops to around 500 RPM. This is rather annoying, since alternator output at 500 RPM is low, and it tends to vibrate the vehicle a bit, especially when you put it into gear.
Any ideas what could be causing the low idle speed? The IACV works perfectly and there are no vacuum leaks. I was thinking about possibly jumping gear selection pins to make the computer think it was in park/neutral?
It starts up fine and great, high-idles at ~1200 RPM cold, and as the coolant temperature comes up the idle speed drops. Once it hits full operating temperature, the idle drops to around 500 RPM. This is rather annoying, since alternator output at 500 RPM is low, and it tends to vibrate the vehicle a bit, especially when you put it into gear.
Any ideas what could be causing the low idle speed? The IACV works perfectly and there are no vacuum leaks. I was thinking about possibly jumping gear selection pins to make the computer think it was in park/neutral?