Variable 10k mod = nothing

1206 Views 6 Replies 4 Participants Last post by fautnsmllit, Mar 1, 2009

fautnsmllit

Discussion Starter · Feb 28, 2009

Today tried the 10k mod and found it didnt do anything for me. I put a 6.2k inline with a variable 10k resistor, then dialed it into a total of 10k. I then plugged it in and flipped the switch and nothing happed. The idle didnt change, no power difference. I varied the resistance all the way from 6.2 to 16.2 and found no difference at either setting. Removed that bit and installed a straight 4.5k and it didnt seem to do anything either. I figured I would at least get the bad idle everyone talks about. I checked my wires that went into the ipr and each had voltage on them (@12volts) when the key was on. This tells me they were making contact. I am just puzzled by it. Everyone seems to get a noticeable differance but absolutely nota for me. I am sure I put the wires into the right holes on the IPR sensor plug.
Any ideas on the cause or cure.
Many thanks

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Jerry Miller

· #2 · Feb 28, 2009 (Edited)

fautnsmllit said:
I checked my wires that went into the ipr and each had voltage on them (@12volts) when the key was on. This tells me they were making contact. I am just puzzled by it. Everyone seems to get a noticeable differance but absolutely nota for me. I am sure I put the wires into the right holes on the IPR sensor plug.
Any ideas on the cause or cure.
Many thanks

None of the connectors in the ICP plug should read 12 volts. The highest voltage is about 5v. All of the sensors are on a 5v setup. Are you sure you had the IPR?
Jerry

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Jerry Miller

· #5 · Feb 28, 2009

RD97 said:
Sounds like we might have some terminology confusion going on here. The Injector Pressure Regulator (IPR) is the solenoid valve on the bottom of the HPOP. It has a 2 wire plug, one wire is +12V when the key is on, the other is a modulated ground controlled by the PCM. The 10K mod does NOT go on this circuit.

The injector control pressure (ICP) sensor has a 3-wire plug and is mounted on the front of the driver's-side head. This is where the 10K resistor goes (although I'm not sure which wires it involves).

I apologize. I meant to type ICP not IPR. Thanks for catching that. I will edit my post.
Jerry

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