1986 1st Supra Running Poorly

MA70-3.0GT · 04-03-2010, 04:10 PM

IIRC one of those vsv's is to do with fuel pressure & should really be connected, it's possible the whole thing is u/s if the filter is broken off so I'd try find a replacement if possible. As for the broken wire I can't see exactly how it's broken but if it's inside the plug as I'm thinking I'd just shave the side off the plug & solder the wire back onto the exposed connector. Try that first off & see if that improves things.

If you can still hear a vac leak it could be that front metal pipe we mentioned earlier or even the broken vsv, ideally you want a stethoscope or similar to trace more accurately where the sound is coming from. Glad you have it running at least some better anyhow.

P.S. you said the idle changed when you sprayed round the manifold gasket, so that's another suspect for your vacuum leak I guess... are all the mani' to head bolts tight first off with that one?

Oh the joys of using a real computer, I can actually look at longer threads & replying doesn't cause cramp in my thumb!!!

04-03-2010, 04:10 PM	#25
MA70-3.0GT 12psi boost Join Date: Oct 2009 Location: Crewe, England Posts: 356	IIRC one of those vsv's is to do with fuel pressure & should really be connected, it's possible the whole thing is u/s if the filter is broken off so I'd try find a replacement if possible. As for the broken wire I can't see exactly how it's broken but if it's inside the plug as I'm thinking I'd just shave the side off the plug & solder the wire back onto the exposed connector. Try that first off & see if that improves things. If you can still hear a vac leak it could be that front metal pipe we mentioned earlier or even the broken vsv, ideally you want a stethoscope or similar to trace more accurately where the sound is coming from. Glad you have it running at least some better anyhow. P.S. you said the idle changed when you sprayed round the manifold gasket, so that's another suspect for your vacuum leak I guess... are all the mani' to head bolts tight first off with that one? Oh the joys of using a real computer, I can actually look at longer threads & replying doesn't cause cramp in my thumb!!! __________________ '89 MA70 Supra GT aero 3.0turbo JDM, Rebuilt motor, K&N intake, 3" stainless turbo-back. New turbo and braided line kit... '89 Honda NC27 400, NC23 cams, open pipe, PC36a shock & possibly Showa USD forks... '83 Yamaha 29R XJ750E-II, number 69 off the line, only runner in the country? Original except Koni shocks '95 Honda PC26 CB500R, Winter hack, hateful, trying to sell it I'm not paranoid, they really ARE after me!!!