How can I adjust the idle up a tad. It idles now at about 750 rpm's and with the high amp alternator I have, i would like it to idle at around 1000 rpms....
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Adjusting Idle on a 2.9....
- Thread starter mjonesjr
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Psychopete
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PCM controls the idle.
That will increase the idle speed, but it will also screw up the base idle that the screw is used for.
Install a bad IAC?
J/k
If you must know though, it's located under the black sheild near the throttle body, under this sheild, the throttle cable attaches to the TB. You can't miss it.
I seriously wouldn't adjust the screw if I were you, but that's just me.
Best bet would be to have something that you can hold the throttle unattended for when you actually need the amperage from the alternator. (2x4? )
Pete
That will increase the idle speed, but it will also screw up the base idle that the screw is used for.
Install a bad IAC?
J/kIf you must know though, it's located under the black sheild near the throttle body, under this sheild, the throttle cable attaches to the TB. You can't miss it.
I seriously wouldn't adjust the screw if I were you, but that's just me.
Best bet would be to have something that you can hold the throttle unattended for when you actually need the amperage from the alternator. (2x4?
)Pete
kunar
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probably wont control you auto trans.... i would use a little shim to hold open the TB just a hair when you need the higher idle
rickcdewitt
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maybe a throttle cable like cheap thrill? to hold any rpm?i don't have a need for a 2.9 alt anymore but out of curiousity where did you get a high amp alt?what rating?
I got a PowerMaster 200A alternator. I got it from Summit for $300. That is cheaper than any shop around me wanted to rewind my alternator.
I had to extend my upper mount bracket because the ear on the PowerMaster alternator ear is 180* from the lower mount where the stock is about 90* off the lower mount.
Here is my extended bracket:
MAKG
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A few misconceptions here:
The "idle stop screw" is a TPS adjustment. Idle is controlled by a bypass valve. The only way you will actually change idle is to overpower the idle valve or to whack out the TPS so badly that the computer thinks you're not idling. Both of these are BAD IDEAS. Don't expect a control system to do the right thing if you lie to it. This is not a carburetor.
If you really want to change your idle, you have to reprogram the computer. Period. Don't lie to it; change the idle speed. 2.9Ls make PISS poor torque below 2000 RPM, so the dinky 100 RPM difference from a manual transmission isn't going to matter.
The problem I suspect you're running into is that the voltage regulator runs at minimum well above idle speed, so you brown out at idle. If that's a problem, you have two reasonable solutions:
1. Hold the throttle open by hand (well, foot), or with the 2x4 mentioned earlier.
2. As voltage regulators on 2.9Ls are integral with the alternator, look for a way to adjust it on your aftermarket alternator. Call the manufacturer.
FYI, the A4LD is not a completely computer controlled transmission, but parts of it are. The torque converter clutch is driven by the computer. On some models, so is the OD shift. And you will likely KILL an A4LD if you run it continuously with no torque converter clutch.
The "idle stop screw" is a TPS adjustment. Idle is controlled by a bypass valve. The only way you will actually change idle is to overpower the idle valve or to whack out the TPS so badly that the computer thinks you're not idling. Both of these are BAD IDEAS. Don't expect a control system to do the right thing if you lie to it. This is not a carburetor.
If you really want to change your idle, you have to reprogram the computer. Period. Don't lie to it; change the idle speed. 2.9Ls make PISS poor torque below 2000 RPM, so the dinky 100 RPM difference from a manual transmission isn't going to matter.
The problem I suspect you're running into is that the voltage regulator runs at minimum well above idle speed, so you brown out at idle. If that's a problem, you have two reasonable solutions:
1. Hold the throttle open by hand (well, foot), or with the 2x4 mentioned earlier.
2. As voltage regulators on 2.9Ls are integral with the alternator, look for a way to adjust it on your aftermarket alternator. Call the manufacturer.
FYI, the A4LD is not a completely computer controlled transmission, but parts of it are. The torque converter clutch is driven by the computer. On some models, so is the OD shift. And you will likely KILL an A4LD if you run it continuously with no torque converter clutch.
holyford86
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I would re think that alternator bracket, it doesnt look like it will stay tight for very long. I had to do the same kind of thing when I installed my 130 amp taurus alternator (which looks identical to that powermaster). you can check the tps baseline at the center pin at the tps, many people will list the voltage at .9 volts but upon looking it up in shopkey 5 they list .84 volts as the optimal setting, there is a specific procedure to setting it as well, I can get it for you if you would like.
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