Making your own Adj. MAP sensor for a 4.0 engine - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 09-12-2002, 10:26 AM Thread Starter
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Making your own Adj. MAP sensor for a 4.0 engine

I just wanted to post my experience with something I tried from a Stroker board I frequent. If you have modified your 4.0 and need an adjustable MAP sensor (to fool the computer) you can buy one from Turbo City for around $95.

The parts for the this DIY project cost $3.50 at Radio Shack. The stock voltage going to the MAP sensor is around 4.8v to 5.0v. The end result is being able to change the voltage going in, which changes the voltage going out to the computer.

I am able to change the voltage going in from 0-12 volts using a 15 turn trim POT and a resistor. I am planning to do a simple write-up, but it is pretty easy.

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post #2 of (permalink) Old 09-13-2002, 11:25 AM
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Re: Making your own Adj. MAP sensor for a 4.0 engine

Help me out. I know the MAP (Manifold Absolute Pressure) is a major sensor for ignition, timing, etc. but why would I want to change it?....What is the end result of changing the voltage levels in order to fool the computer into doing?
post #3 of (permalink) Old 09-14-2002, 06:24 AM
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Re: Making your own Adj. MAP sensor for a 4.0 engine

raymo, please post the particulars when you get it done.. though I think i see what your doing...
my stroker runs so well, I'm afraid to do anything to it...
yesterday i was trouble shooting a noise.. had the rear driveshaft out.. i got on it a little too hard and broke a 35 spline d-60 hub [img]images/icons/blush.gif[/img]... driving home with the arb engauged pulling only 1 side in the front is an experience...
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