fxracer20v
New Member
- Joined
- Mar 15, 2008
Sorry for the super long NOVEL i just wrote. Hopefully someone can help me.
i have a 87 GN in my shop and have been having problems with the timing retarding dramaticly. acctually let me start from the begining. customer brought it in comlaining of low power. test drove the car and it did't make any boost till the upper RPM range. by that time it was shiffing to the next gear. i put it on the dyno, did a pull and noticed it had low boost. then figured out the wastgate was faulty and opening very early and fluctuating alot. ordered a new adjustable wastegate and hose assy, installed them, now i have normal turbo reaction. boost comes on normaly and holds. after the install it now has a new problem. boost comes on, it starts to pull hard then power falls off but i still have consistend boost preasure. now with scanner hooked up (new snap-on scanner, not the scanmaster), key on, engine off i get a knock reading of 0 like i should. after starting the car it doesnt stay at zero. after every start i get a different number, 89, 43,28,106, etc.which is representing some sort of knock signal not actuall knock retard. i know these numbers probably make no sense because im using a snap-on scanner and not a scanmaster which u guys are used to. i unplugged the knock sensor and cautiously did another pull on the dyno. same thing. i then unplugged the ESC. check engine light came on like it should but i now read 0 all the time. i again did another cautious pull and now have a ton of power. i plugged the module back in and the problem came back. QUICK note, there was only one instance when i started the car and the scanner read 0, so i did a pull and i had full power. i shut the car off, restarted it and the problem was there again. this only happened once. i have a TSB relating to the ESC module in my computer which leads me to think it might be the culprit. now that u have read my NOVEL my question is, does any one have instructions on checking the ESC module or have any other ideas. i have checked everything else, fuel preassure, etc. i know it has something to do with the timing retarding on me. before i sell my customer a really expensive ESC module i want to bee 100% sure its the problem. again sorry for the super long NOVEl and thanks in advance for any/all replies and help.
i have a 87 GN in my shop and have been having problems with the timing retarding dramaticly. acctually let me start from the begining. customer brought it in comlaining of low power. test drove the car and it did't make any boost till the upper RPM range. by that time it was shiffing to the next gear. i put it on the dyno, did a pull and noticed it had low boost. then figured out the wastgate was faulty and opening very early and fluctuating alot. ordered a new adjustable wastegate and hose assy, installed them, now i have normal turbo reaction. boost comes on normaly and holds. after the install it now has a new problem. boost comes on, it starts to pull hard then power falls off but i still have consistend boost preasure. now with scanner hooked up (new snap-on scanner, not the scanmaster), key on, engine off i get a knock reading of 0 like i should. after starting the car it doesnt stay at zero. after every start i get a different number, 89, 43,28,106, etc.which is representing some sort of knock signal not actuall knock retard. i know these numbers probably make no sense because im using a snap-on scanner and not a scanmaster which u guys are used to. i unplugged the knock sensor and cautiously did another pull on the dyno. same thing. i then unplugged the ESC. check engine light came on like it should but i now read 0 all the time. i again did another cautious pull and now have a ton of power. i plugged the module back in and the problem came back. QUICK note, there was only one instance when i started the car and the scanner read 0, so i did a pull and i had full power. i shut the car off, restarted it and the problem was there again. this only happened once. i have a TSB relating to the ESC module in my computer which leads me to think it might be the culprit. now that u have read my NOVEL my question is, does any one have instructions on checking the ESC module or have any other ideas. i have checked everything else, fuel preassure, etc. i know it has something to do with the timing retarding on me. before i sell my customer a really expensive ESC module i want to bee 100% sure its the problem. again sorry for the super long NOVEl and thanks in advance for any/all replies and help.