hey guys, after putting my new motor in and driving it for a while iv noticed when im just crusing along ( very little if any throttle ) the car will jolt every now and then...kinda like a took a small stab at the accelerator...it's not bad enough to cause any discomfort but am worried that it might be the start of somthing worse...spart seems to be fine...there is no fuel leaking out of the injectors..has a brand new throttle body and all associated bolt on's...the idle dose seem to be rough..but not all the time...it kinda comes and goes..iv sprayed carbi/throttle body cleaner on all the vacume joins and hoses in the engine bay and there dosnt seem to be a vacume leak ether...the fuel filter is less then a year old too...when the motor was out i pulled the came angle sensor out to get to the welch plug behind it..it put it back the same way i took it out...could that be part of the issue...there is plenty of power...im stumped :S

Check and clean the ISC for a start is what i would do.

i cleaned it before the motor went in...

silly question but did you reset the ECU properly?

seems the issue was some where in the drive line. i got the gearbox oil topped up and tailshaft bolts tightend and now it's fine

i have worked out that the motor seems to miss when it's warmed up and on light load...any ideas??

If all else fails, check for vacuum leaks. This can produce some odd, hard-to-diagnose problems. Spray parts cleaner or brake cleaner spray along all vacuum hoses and all gaskets on the intake side. If there is a leak, the spray gets sucked in and the revs jump. Don't use start spray - it's not flammable enough, so sometimes it doesn't find the leak (as I found out the hard way after replacing a couple hundred bucks worth of perfectly good parts).