map code and throttle fault - advice
12-09-2012, 03:55 PM
#1
Teching In
Thread Starter
Join Date: Apr 2008
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
map code and throttle fault - advice ive installed a ls2 block, ls3 heads and cam into a project car. i used a gm ls3 run kit, with a fbw throttle body
this was almost plug and play, but the inlet manifold used the earlier ls2 (without bolt) map sensor, so i cut off the loom plug, wired in one to suit the map on the inlet, fired her up, and were good to go.
the car starts, runs fine, throttle works fine etc.
occasionally, when i first start, i get a map fault. ive tried swapping the outer 2 wires over, (read somewhere that is sometimes required). but the engine wont fire. flicking the kill switch seems to clear this code. so far, it has not lit when driving, just on startup.
ive swapped in another map sensor, same issue
twice now, whilst the map code has been lit, the throttle has refused to operate, i just tick over, not even part throttle. this was cleared by flicking the battery kill switch, after which both the map and throttle were fine.
i dont have ls edit, but plugged a generic code reader in, which said map high circuit fault.
could this be that the ls3 run kit ECU. is expecting a slightly different reading from a different map sensor (i cant fit this as the mount is different).
is the throttle issue likely to be a limp mode? there was no fault relating to the throttle.
the ECU has a black, grey, blu plug going into it.
help appreciated
this was almost plug and play, but the inlet manifold used the earlier ls2 (without bolt) map sensor, so i cut off the loom plug, wired in one to suit the map on the inlet, fired her up, and were good to go.
the car starts, runs fine, throttle works fine etc.
occasionally, when i first start, i get a map fault. ive tried swapping the outer 2 wires over, (read somewhere that is sometimes required). but the engine wont fire. flicking the kill switch seems to clear this code. so far, it has not lit when driving, just on startup.
ive swapped in another map sensor, same issue
twice now, whilst the map code has been lit, the throttle has refused to operate, i just tick over, not even part throttle. this was cleared by flicking the battery kill switch, after which both the map and throttle were fine.
i dont have ls edit, but plugged a generic code reader in, which said map high circuit fault.
could this be that the ls3 run kit ECU. is expecting a slightly different reading from a different map sensor (i cant fit this as the mount is different).
is the throttle issue likely to be a limp mode? there was no fault relating to the throttle.
the ECU has a black, grey, blu plug going into it.
help appreciated
