HELP!!! mystery 4AGE problems

[land yacht]

hi,

last weekend i ripped out my old 4age and put in a JDM long motor ( sump to cam covers ) and now i am having major dramas

i swapped all the ancilleries over from the old motor...manifolds, infector setup, anternator etc etc

when its in neutral it idles ( idle hunting aswell ) and appears to rev up fine, but when your driving along it feels like crap, mis-firing and massively no power

and the exhaust side cam cover heats up to pretty damn hot, hot enough that you dont want to touch it.

cold start works fine

any ideas?

[Javal]

Misfire under load, eh?

Check your timing and have a look at your spark plugs to start with.

[slide86]

its not something silly like a blocked exhaust?

nothing like a rag fell in the exhaust when you had the engine out?

[land yacht]

checked the plugs when i put them in, they were fine
and the timing was set between 5-20...but hard to set while its hunting

exhaust is all clear

[Javal]

No vac leaks?

Distributor / Rotor button g/c?

[Eddy]

leads pluged in well
lead from coil good
i had same problem with my 4ac last night, put the power down and it was crap, one of the leads had wriggled off a bit

[land yacht]

i know there is a slight vac leak which is causing the idle hunting, but its not big enough to cause this sort of drama

lead, cap, button all in good condition

i have a feeling that it might be a fucked injector

[Javal]

A fucked injector wouldn't be fine at idle and worsen under load. It would be there or it wouldn't be.

Check ecu, check for codes now.

[Kid Karola]

did you figure out what ECU it had?

[land yacht]

pretty sure its a jap ecu, although i really have no idea, the sticker is almost unreadable