View Full Version : wtf?

09-06-2005, 01:35 AM
so i got my car back from getting the motor rebuilt a few days ago and it doesnt run all that good. When the car is parked and you step on the gas, right around 3300 to 4000 rpm is will start to back fire, not flames or anything like that just make popping noises alot. when im driving it, it will start to bog and jerk around at this rpm. it doesnt always do it, in fact, it usually doesnt. if i accelerate harder than normal it usually wont do it, but if its slow and if its in a gear that you stay in longer like 4th or 5th it will do it alot more than in 2nd or 3rd. the spark plugs tell me that its running lean but it still shoots flames. it also doesnt hold boost for shit. if im in 5th and give it gas (not floor it, cause the engines new) it will easily hit about .7 bar at around 3300rpm but will quickly drop down to about .3 at about 3800 even if more gas is applied. i checked all vaccum lines and anyhthing else that could leak. i got a new fuel filter and that helped a very very little bit. anyone no wtf's going on and how to fix it?

initial what?
09-06-2005, 03:43 AM
what are you tuning with (if any)? and whats your current setup right now?

09-06-2005, 04:17 AM
not tuning with anything right now, it does also does it more when its hot then cold

09-06-2005, 04:38 AM
it should be the other way around...

09-06-2005, 08:53 AM
oxygen sensor(s) in good shape? check the intake manifold gaskets for leaks as well. let the engine run and spray around the manifold mating surfaces and all vacuum fittings and such with starting fluid or brake cleaner.. anything highly flammable. ;)
if you've got a leak somewhere, you'll find it quickly that way.

09-06-2005, 02:08 PM
i was thinking it may be a temp sensor. since it does it more when its hot, the temp sensor may be messed up and giving off a false reading. the ecu may be making the motor run weird do to this. i dunno.....
also, which would you guys reccomend for tuning. emanage or s-afc. thanks

09-06-2005, 02:24 PM
e-manage ultimate.

09-06-2005, 04:09 PM
i dont have enough money for the ultimate, i was thinking of the original emanage or s-afc. i know i could save up, but i wanna get it soon. anything suggestions help, thanks

09-09-2005, 03:23 AM
e-manage is better.

09-09-2005, 10:45 AM
sounds like you are off time

09-12-2005, 12:01 AM
mmm check out the spark plugs. might be fouled from running rich as shit

09-12-2005, 06:50 PM
Check your timing.

09-13-2005, 01:10 AM
e-manage ultimate is better

09-14-2005, 11:58 PM
check your ecu for codes

09-15-2005, 12:08 AM
the spark plugs look ok and the timing is right, the mechanic that built my motor said he thinks its something in the ecu. im gonna get it checked out tomorrow, so ill see whats going on with it. thanks guys