[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index] Re: Overboost problem - Hello Charlie spring users!
In a message dated 96-09-01 04:49:52 EDT, you write: << In message <199609010306.UAA21852@netcom2.netcom.com> orin@netcom.com (Orin Eman) writes: Problem: Orin has 1.5 bar then shutdown with WG solenoid hooked up, normal operation disconnected..... > It still overboosts! Currently I've disconnected and plugged the pipe > from the solenoid valve to the wastegate. No more overboost - I'm getting > 5 to 6PSI boost. Get yourself a LED and hook it up to the WG solenoid wires.... sounds to me like you have a stuck solenoid.... If you bypass the solenoid all together and run the hose from the t-body directly to the top of the wg, you will get the exact conditions you describe.... If you disconnect the solenoid and plug it from the circuit, you will get exactly spring pressure no more.... You hook up the stuck wg solenoid and you get 1.5 boost then cutoff... That really means that those folks with Charlie Smith spring mods might want to pay attention, cuz with the ground feature disabled, Orin here would have just blown his motor.... Cuz, Orin, the stuck solenoid is really just adding in boost pressure on top of the wg, which won't stop until the motor does, basically no limit to boost.... The computer saved you many times over, cuz it detected the faulty WG solenoid via the programmed boost threshold (stock 5ktq is 1.5bar) and grounded the fuel pump.... Ck the wiring to the solenoid (12v duty cycle, signal?), then replace the solenoid..... One of the problems with spring mods only... In fact, those of you running charlies mod, might just want to plug the solenoid (it isn't doing anything anyhow I would bet, 'cept waiting for Orin's ordeal to blow you up) and Phil's idea of plugging the wg is valid, tho an adjustable spring perch might be a more exacting mod.... Orin, you did all the diagnostics for yourself..... Good luck, carry on... And Charlie Smith spring users can send the "saved my motor" donations to me, I'll forward the 20% to Orin for being the guinee.... Scott
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