My '87 has an issue..
I just bought this car in May (not running, mostly due to a dead battery and a sick MAF sensor) solid, straight car with just under 60k miles on it, all stock and original, never raced, never modified, bought it off of the 2nd owner since '98.
When you mash the gas it accelerates hard for a second or two, then acts like it's not getting enough fuel. It makes this electrical-type "cracking noise" once boost kicks in. But if you accelerate the throttle gradually, it's fine. Under gradual acceleration it pulls nice and smooth, as does while it's under a constant steady speed, no sputtering or anything.
So to help correct this problem after I've given it a tune up (new oil/filter, fuel filter, plugs (Delco R44TS), air filter and plug wires) the problem still persisted. I installed a new TPS sensor (just process of elimination) and the Racetronix/Walbro fuel pump and hotwire harness kit and it helped considerably... but the problem still slightly exists. 9 times out of 10 I can stage boost off the line and hold the pedal to the floor with no problems at all until the RPM's start to climb, then it starts to cut out again. I've been doing a bit of research, but I just wanted to know your guys' opinion. Could it possibly be the wastegate accuator/solenoid? boost lines between the turbo and the wastegate? I've also noticed that according to my factory "high-tech digital boost gauge" :tongue: that I'm pushing more than 15psi, as it lit up past 15psi all the way to through the "redline". It still has the original non-adjustable wastegate accuator and turbo, so the ol' Garret was never replaced under warranty by the factory.. Any thoughts or ideas?
I just bought this car in May (not running, mostly due to a dead battery and a sick MAF sensor) solid, straight car with just under 60k miles on it, all stock and original, never raced, never modified, bought it off of the 2nd owner since '98.
When you mash the gas it accelerates hard for a second or two, then acts like it's not getting enough fuel. It makes this electrical-type "cracking noise" once boost kicks in. But if you accelerate the throttle gradually, it's fine. Under gradual acceleration it pulls nice and smooth, as does while it's under a constant steady speed, no sputtering or anything.
So to help correct this problem after I've given it a tune up (new oil/filter, fuel filter, plugs (Delco R44TS), air filter and plug wires) the problem still persisted. I installed a new TPS sensor (just process of elimination) and the Racetronix/Walbro fuel pump and hotwire harness kit and it helped considerably... but the problem still slightly exists. 9 times out of 10 I can stage boost off the line and hold the pedal to the floor with no problems at all until the RPM's start to climb, then it starts to cut out again. I've been doing a bit of research, but I just wanted to know your guys' opinion. Could it possibly be the wastegate accuator/solenoid? boost lines between the turbo and the wastegate? I've also noticed that according to my factory "high-tech digital boost gauge" :tongue: that I'm pushing more than 15psi, as it lit up past 15psi all the way to through the "redline". It still has the original non-adjustable wastegate accuator and turbo, so the ol' Garret was never replaced under warranty by the factory.. Any thoughts or ideas?
