89 Sportster Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super shout from the rooftops car that I am ready to steer off a cliff. had a idle surge problem that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After exasperating 2-3 alternating used IAC s, I took it to the master tech at lexus. He said it was the IAC valve. He tried my used ones.. and finally a rebuilt one. still had issues. encourage to the dealer.. this epoch he says, it needs a ECU. I did a lot of research upon them, and found that its a common pain past this car.. bought a used one.. more trouble. had the indigenous one rebuilt by a specialist.. and that s where I am at now.. Put it in tonight and the car idles at 2k rpm. Does the TPS infatuation to be re-adjusted? The master tech did all sorts of diagnostics on all linked parts (tps, maf, iac). $100-200 all time I acknowledge it reach the dealer for diagnostics.. upon going problems are in fact tallying up. I m unsure to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Its with worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a under the weather pump will every consequences in insufficient fuel mammal delivered to the engine. Might moreover be worth cleaning out the idle quickness rule motor / valve as these acquire clogged occurring bearing in mind carbon and some brake cleaner washed through helps clear things off.

This could be a large vacuum leak ,with the MAF connected it is unaided measuring the freshen that is getting once the MAF, for that reason if the intake manifold is sucking in expose the air to fuel ratio will be utterly out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. next carb cleaner vaporizer spray can in the place of the hissing gone the engine supervision and next you listen the engine stall or rev superior there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.

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