Hi all,
Some of you may remember my engine swap from hell a while back. I had to take the car back to the place that did the swap, my brother in law convinced me to do so. They have a new mechanic now so I was willing to let him have a go to fix it. Good job I did because had I taken it someplace else I would have had to pay for the repairs - new head cylinder, new gearbox and new piston rings. They have also done a lot of extra work on the engine and replaced nearly every bearing (if not every) - big end and main bearings and all in the gearbox. I will follow up the engine swap thread soon because the new mechanic has done a fantastic job with it and they have done so much extra that they didn't have to (but was nice they did it for me). Basically I have a fully rebuilt engine now.
There is one problem though...
After 250 miles since rebuild... car pulls lovely and fine in the bottom end, but top end feels very restrictive... engine feels as if it wants to go a lot faster but can't (does that make sense?) Engine idles at about 750ish, When I rev the engine upto 2.5 or so the revs fall back to 500 or so (bottom of the guage) before rising to normal. When driving and dipping the clutch to change down and breaking at the same time can cause this and it will sometimes stall.
We (brother in law and myself) thought the problem was within the throttle body, and when we disconnected the map sensor and drove the car bottom end was patheticaly (sp?) poor, took half throttle to pull away without stalling! but above 4k it pulled harder and stronger than it ever had before!! Exhaust pops on the overrun which it has never done before (I have a fully de cat setup)
Connected it all back up and reset the ecu and it was back to its old self. Checked all the voltages from the sensor and they were fine...
I know the car is over fueling, and the above sound like the symptoms of over fueling, and I suspect that I need engine management now with all the mods done to it, but could it be something else as well? I checked all the vacuum lines as well and they ara all good.
I'll be taking it back for him to look at but he isn't there until wednesday, and if it's something easy i'd like to have a look fixing myself.. i'm just out of ideas at the moment.
Thanks for the help!
Tim
Some of you may remember my engine swap from hell a while back. I had to take the car back to the place that did the swap, my brother in law convinced me to do so. They have a new mechanic now so I was willing to let him have a go to fix it. Good job I did because had I taken it someplace else I would have had to pay for the repairs - new head cylinder, new gearbox and new piston rings. They have also done a lot of extra work on the engine and replaced nearly every bearing (if not every) - big end and main bearings and all in the gearbox. I will follow up the engine swap thread soon because the new mechanic has done a fantastic job with it and they have done so much extra that they didn't have to (but was nice they did it for me). Basically I have a fully rebuilt engine now.
There is one problem though...
After 250 miles since rebuild... car pulls lovely and fine in the bottom end, but top end feels very restrictive... engine feels as if it wants to go a lot faster but can't (does that make sense?) Engine idles at about 750ish, When I rev the engine upto 2.5 or so the revs fall back to 500 or so (bottom of the guage) before rising to normal. When driving and dipping the clutch to change down and breaking at the same time can cause this and it will sometimes stall.
We (brother in law and myself) thought the problem was within the throttle body, and when we disconnected the map sensor and drove the car bottom end was patheticaly (sp?) poor, took half throttle to pull away without stalling! but above 4k it pulled harder and stronger than it ever had before!! Exhaust pops on the overrun which it has never done before (I have a fully de cat setup)
Connected it all back up and reset the ecu and it was back to its old self. Checked all the voltages from the sensor and they were fine...
I know the car is over fueling, and the above sound like the symptoms of over fueling, and I suspect that I need engine management now with all the mods done to it, but could it be something else as well? I checked all the vacuum lines as well and they ara all good.
I'll be taking it back for him to look at but he isn't there until wednesday, and if it's something easy i'd like to have a look fixing myself.. i'm just out of ideas at the moment.
Thanks for the help!
Tim
