its a 88 xj with 4.0 aw4. lately i've been having this intermittent problem with a high idle.
sometimes it'll idle high. close to 3000rpm when starting. then drop back down.
other times and this is the most annoying is i'll be driving then notice that when i'm braking its still wanting to surge forward. so its idling high again but in gear. now if i stop and let it sit a few minutes if it does this i can start it up again and everything is fine.
wtf is the problem? i've searched a bit and saw some theory on the latch circuit and IAS.
but is this a IAS problem or a TPS problem?
sometimes it'll idle high. close to 3000rpm when starting. then drop back down.
other times and this is the most annoying is i'll be driving then notice that when i'm braking its still wanting to surge forward. so its idling high again but in gear. now if i stop and let it sit a few minutes if it does this i can start it up again and everything is fine.
wtf is the problem? i've searched a bit and saw some theory on the latch circuit and IAS.
but is this a IAS problem or a TPS problem?