Will it ever end? Not looking good! |
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Will it ever end? Not looking good! |
customstarr |
Jun 19 2007, 06:09 PM
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#1
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King of the Nighttime World Group: Members Posts: 116 Joined: 13-February 07 From: Waterford, Michigan - Home of Waterford Hills Road Racing Member No.: 7,531 |
My car still idles like pure crap. Very inconsistent - high to low surging, super low, rich... you name it, this car's idle is ALL OVER THE PLACE. It's never the same condition. The car runs like a raped ape and goes good, but the idle sux complete ass. I used to be able to get some idle adjustment at the TB screw (I don't have the ECM screw), but today I set the fuel pressure correctly (was at 42 PSI) and now I have no control over the idle mix/speed. Maybe someone in the past tried to cover the problem by cranking up the fuel pressure. I'm not seeing the super rich condition now, but like I said... no control.
I've been through everything: replaced/fixed wiring, new ignition system, battery, cables, checked all the standard fare + what I've listed below, etc. This is getting ridiculous. What I've replaced thus far: 1. Ignition: Coil, Cap, Rotor, Points, Condenser, Plugs, Wires (all Bosch except plugs). 2. Fuel/D-Jet: TS1, Fuel Filter, Vacuum Lines. What I've checked, adjusted to spec, or tested to be good: 1. Ignition: Points, Timing, Trigger Points. 2. Fuel/D-Jet: MPS, TS2, Fuel Pressure Reg, Cold Start Valve, Aux Air Reg, Injectors, Fuel Lines, Fuel Pump, Throttle Body, Throttle Switch. 3. Engine: Timing, Compression, Valves. |
Bartlett 914 |
Jun 21 2007, 07:18 AM
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#2
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Advanced Member Group: Members Posts: 2,216 Joined: 30-August 05 From: South Elgin IL Member No.: 4,707 Region Association: Upper MidWest |
You may also have a bad electrical connection to the ECU. Wires get old and crack. Dirt also plays havoc on connections. Make sure the connector on the ECU hac clean connections. Also make sure that there is a connection from the CHT (near cyl #3) to the ECU. This connection could be broken.
Don't give up! There is an answer and you will find it. |
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