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  1. [Engine] Two things on my car: The throttle cable had...

    Two things on my car:

    The throttle cable had worn through the outer rubber where it was clamped on the passenger side valve cover.

    Greasing the large throttle spring on the spool fixed my...
  2. [Engine] What do the rating numbers on the heads of the...

    What do the rating numbers on the heads of the bolts say?
  3. Before I found my bad deceleration springs, I...

    Before I found my bad deceleration springs, I tried to plug that hose from the oil filler to get the idle RPM down. What it did was drop the idle 50 to 75 RPM. But running like that, I got some oil...
  4. [Engine] Yes, those look good.

    Yes, those look good.
  5. [Engine] Post a photo of the deceleration springs. You...

    Post a photo of the deceleration springs. You pull the W pipe and move the throttle and you can see them. If they are not evenly spaced, they are bad.
  6. [Engine] Everything but the shutting the engine off fixes...

    Everything but the shutting the engine off fixes it sounds like bad deceleration springs. So how long does that shutting off fix it? The springs should only open after you release the throttle...
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    [Electrical] Normal for the stock RPM relay to get hot, yes. ...

    Normal for the stock RPM relay to get hot, yes. Make sure your pins in the socket are tight. I use a male pin crimped to a short wire as a tester for the relay pins. You stick it in each socket...
  8. Most test instruments read percent backwards from...

    Most test instruments read percent backwards from an automotive meter. You can test the meter by pressing the wide open throttle. WOT should read 60%, if you read 40% then your reading backwards. ...
  9. Yes with the motor in your hand, you will know it...

    Yes with the motor in your hand, you will know it never shuts off.

    FYI:

    The smaller Volvo motor is much better than the OEM because it runs without dead spots and draws half the current. I run...
  10. The engineers may have wanted it to work like...

    The engineers may have wanted it to work like that but it does not. The ECU runs all the time power is on (Key on). The idle motor gets power (12 volts to the center pin) from the ECU when the ECU...
  11. The thermistor feeding the idle ECU is a variable...

    The thermistor feeding the idle ECU is a variable resistance. From memory it normal runs from about 50 Kohm cold to less than one Kohm hot. From about 50 Kohm (or higher) to 10 Kohms it varies how...
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    [Engine] +1 Another problem is when your deceleration...

    +1

    Another problem is when your deceleration valves are bad. That extra vacuum leak makes the Idle motor run to it's minimum opening. The idle motor has very little torque at the extreme ends...
  13. FYI: With the stock idle ECU the idle motor...

    FYI:

    With the stock idle ECU the idle motor does not close all the way. The amount it can close is dependent on the thermistor resistance. Higher resistance (cold engine) the IAC can not close...
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    [Engine] That is a good question. My guess is they do get...

    That is a good question. My guess is they do get 80 PSI when the oil is cold and the pump design lets that thick oil build more pressure.
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    [Engine] Knurling the valve guides was considered better...

    Knurling the valve guides was considered better because it would hold oil longer. It was done with a threading tool that just pressed the metal higher in areas and then the reamer just pressed the...
  16. [Fuel] When I was testing the pump and sender I used my...

    When I was testing the pump and sender I used my bench power supply. That gave me accurate current and voltage. In the past I did do testing on the OEM pump and found a 1 volt drop at the two pin...
  17. [Fuel] Only time I've heard of the fuel pump fuse...

    Only time I've heard of the fuel pump fuse blowing is when a frequency valve was shorted. The long wiring also limits the current draw. I know of a few warmup regulators that have shorted the...
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    The deceleration springs would have a constant...

    The deceleration springs would have a constant leak cold or hot but a cold engine requires more throttle to keep it at the set 775 RPM. So the idle motor opens more on the cold engine. On a hot...
  19. My wires do not run through the pontoon. Running...

    My wires do not run through the pontoon. Running one wire from each device lets you place the wires to avoid hot or sharp edges. I use some vacuum hose (slit it and slip over edges) to protect...
  20. I did this 8 years ago. ...

    I did this 8 years ago.

    http://dmctalk.org/showthread.php?2020-Battery-buss-bar&highlight=battery+buss
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    If your problem just started suddenly, (idle 1300...

    If your problem just started suddenly, (idle 1300 after warm up) then I would suspect you are getting vacuum advance at idle. If it had started getting bad slowly then I would think your problem is...
  22. [Fuel] That was with my GM pump but since it's draw was...

    That was with my GM pump but since it's draw was around 6 amps and the OEM pumps were 7 amps I would expect the same flow rate from either. With the new type pumps, it's real easy to pull the return...
  23. [Fuel] I ran a flow test. This is the amount from the...

    I ran a flow test. This is the amount from the return line with the pump running for 60 seconds. This was with 5 gal. in the tank. Flow was just a little less than 2 quarts for 60 seconds. So that is...
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    [Electrical] Yes, I always recommend all owners get some new...

    Yes, I always recommend all owners get some new lower current fans. That test I did was on an old fan I use when testing the fan fail design. I have Toby's fans in my car.
  25. [Engine] A quality tap is so much better but when tapping...

    A quality tap is so much better but when tapping aluminum you need to just thread a little and keep backing the tap out to remove the chips. It's really bad with soft aluminum (no alloys). Get two...
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