george.bryant Posted January 26, 2007 Share Posted January 26, 2007 Hey All, I'm in rather a pickle here and i'm rather dissapointed about it. OK, Car starts find and idle is good. Take off in first appears to have more exhaust noise compared to usual (but maybe i'm hearing things and i'm trying to figure this out) Through each gear, the power seems rather low under 2000rpm, once 2000rpm (around about) is hit the motor seems to pcik up a fair bit. THen the boost kicks in, but it seems hesitant. Sort of feels like its misfiring when i put my foot right down. Going up hills is even sluggier and boost takes a veyr long time to come on. Also travelling along on the flat and then stopping rather quikly (4th, 3rd, 2nd, the brake) the motor beings to sumbly around and rpms drop to around 300rpm and it drops even lower if u dont quickly give it a few hundred revs to get it back up. Prior to these issues, the standard turbo was replaced as it was damaged and a RB20det turbo was fitted to the L20et. But, as the PCV and turbo had no clearance I removed the PCV valve and bunged it. THe hose that used to go from the block to the PCV valve now breathes, and the pipe that goes from the AFM pipe to the rocker cover breather is still connected. I didnt think thiat was the issue with the lack of power as I ran the car for a 1 day prior to these issues and it ran O.K. I've tried another dizzy cap, another coil lead, tightening all hose clamps on the intercooler piping and turbo, advancing & retarding ignition timing...But the problem still occurs. I really hope you really intelligent L series guys can help me out. Thank you all so much for reading this. Regards, George Quote Link to comment Share on other sites More sharing options...
rags Posted January 26, 2007 Share Posted January 26, 2007 George, Are you running the stock FI setup? If so, the PCV system is an integral part of the overall operation of the system and I do believe that removing it will cause a/f ratio problems. Something similar would be how a loose gas cap also effects how the engine will run. What I did with my car when I upgraded the turbo was to use 2 brass elbows and a 2 inch piece of pipe to relocate the PCV valve. Joe Quote Link to comment Share on other sites More sharing options...
george.bryant Posted January 27, 2007 Author Share Posted January 27, 2007 George, Are you running the stock FI setup? If so, the PCV system is an integral part of the overall operation of the system and I do believe that removing it will cause a/f ratio problems. Something similar would be how a loose gas cap also effects how the engine will run. What I did with my car when I upgraded the turbo was to use 2 brass elbows and a 2 inch piece of pipe to relocate the PCV valve. Joe Yes I'm running the stock fuel injection setup. I realise now after reading more about the PCV Valve how important it is to have. Can you please provide me with more specific details of how you plumbed up the PCV valve using the brass elbows and 2 inch peice of pipe? Possible post some photos if you can. My car is pretty much undriveable and I just want to get the PCV vavle back onto the motor ASAP with as little work as possible. Thanks for the reply Joe. Quote Link to comment Share on other sites More sharing options...
george.bryant Posted January 27, 2007 Author Share Posted January 27, 2007 Update: Tried 2 more AFMs, took for test drive but still the problem occurs. Cleaned Contact points on all parts connections of the loom and then the car didnt start for 30 mins, once I got it running it was running very Rough. THats all i've done so far. I've gotta get the damned PCV valve back on but It will require some work. The thing is, for the 1st day of having the new turbo on the car ran great! Quote Link to comment Share on other sites More sharing options...
aarang Posted January 30, 2007 Share Posted January 30, 2007 I am just taking a guess here, but it seems that if you have the block breather open with a filter and have the rocker cover plumbed in the factory spot after the AFM you would have a non metered source of air coming into the engine. It sounds as though the engine is running a bit lean. Not a vacuum leak as it is before the throttle plate, but air would be drawn through the block breather up to the rocker cover and into the turbo after the AFM. In the past, I would always have either both breathers hooked to the factory location, or just put filters on both the block and rocker cover. A quick way to see if this is your problem would be to take the rocker cover breather line and plug it into the block breather. Cap the hole where the rocker cover breather went before the turbo. Don't leave it setup that way, just take it for a spin and see what happens. Hope this helps!! Aaron Quote Link to comment Share on other sites More sharing options...
george.bryant Posted January 31, 2007 Author Share Posted January 31, 2007 Thanks Aaron I will give that a try when the car is back. I took the car to the auto electricans today to get them to try and figure out the lack of power to the coil so i can actually have the car running and be sure its not going to have another similar electrical issue. Thanks Quote Link to comment Share on other sites More sharing options...
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