many issues on one car

[justaturbolaser]

ok i have a 1990 laser 2.0L turbo, ~170,000 miles on odometer(speedo cable was broke when i bought the car-fixed now) been told it has aftermarket cams(haven't personally looked yet) i bought the car 2yrs ago it had a n/t trans in it w/a flywheel out of a hyunda sonota in it and just a mess as far as many different parts from different cars in it, the po i bought it from said he couldn't find a turbo trans for it so that's why he put the n/t in. well the trans he had in it didn't last very long once i adjusted the shift cables so i could hit all the gears-it actally only lasted 2weeks, anyways, i moved out of state and had to let the car sit w/o being started or moved for ~10months, now i have bought the correct turbo trans, put in a new pressure plate, clutch disk, throwout bearing, and the correct shift cables, and the correct flywheel in the car, i'm trying to get this done quick because my everyday car needs some work, so i get it all 2gether and start it up and it produces black smoke out the exhaust, has a really terrible miss in it, covers the spark plugs in carbon in about 1 minute of running, when i first start it up i can't rev it past 3krpm, it will shoot up to 3500then kick back down and back up to 3500 and it will continue to do this untill i let off the gas pedal, afterward i can't rev it past 2500, and it will start to drop to 2000 and back to 2500 again seems to idle rough but it always has, i have done a compression test on the cylendars, from cams they read 170,100,155,160, i know that the one at 100psi has some sort of issue, i've read in some of the forums that this is caused by a worn exhaust lobe on the exhaust cam, i have also tested the coil pack- the primary had an open circuit, so i replaced it, to no avail, i have no cel light on and i have read the ecu using the analoge mutltimeter and it reads as everything is fine on the engine, i took the fuel injectors out and gave them a good look nothing built up on them checked their resistance which is all within spec in the hanes manuel, i have done a leak test and i cannot find any airleaks (i had the hose for the evap canister hanging but i fixed it before the test) i have also replaced the plug wires, and the plugs are new ngk e6's (of course they are covered in carbon but i thoroughly clean them after each thing i do to fix it) does anyone have any ideas what i'm overlooking? thanx for ## help in advance

 

[justaturbolaser]

yes it sat the whole time w/ the fluids in it, when i did the transmissison, i changed the oil/filter, antifreeze/ clutchfluid, and added octane booster and 5 gallons of fresh gas(there was less than 1/4 of a tank in while it was sitting oh yeah and while the car is at idle it's pulling about 3-4 psi of boost and with the littlest press of the throttle it shoots up to the top of the gauge(stock haven't got an aftermarket gauge yet)

 

[GnArKiLL70]

hhhmmm wow! i would check the ecu.. see if it has any burn spots on the board

 

[68442]

So it holds the pressure when you do a boost leak test? Timing is set correct and base timing 5 btdc? I have a strange knock issue on my 90 laser, since its so easy to log on a 1g I'm making a cable to see whats going on. You might want to do the same. Search for data logging. Most expensive part is a keyspan usb to serial unless you have a laptop with a serial port.

 

[justaturbolaser]

well guys i think i found the problem there is a burn spot on the ecm, just about in the middle on the "top side" almost overlooked it the whole board looks brand new except this one spot and it is right between two of the riser boards and in the center of the really large diode and the two capacitors so i guess i'm going to have to find a new ecm some where, ### this one is damaged beyond what i can repair, there are a couple of the surface mount resistors burned up so i'll let ya guys know what i find out, and as a possibility i think it wont work but what the hey i can ask will a non turbo 1g ecm work or is it a turbo only part? ok thanks for all the help