Cutty Hertz Posted May 21, 2003 Report Share Posted May 21, 2003 Is it ok to drive without the MAP sensor being plugged in? I know I need to replace it but money's kinda short, paying $85.00 for a fuel pump, a fuel pump I didn't need that was already installed by the time I found that out.... Got me a Gauge cluster! It was $10 at yard! I sat in the car for like 2 hours (stubborn wire clips) installing it while it was raining. It works, but even before installing it my speedo doesn't work. Now with the gauges the tach doesn't move at all. Maybe the sensor at the wheel? Does anyone know about this particular situation? Quote Link to comment Share on other sites More sharing options...
patgizz Posted May 21, 2003 Report Share Posted May 21, 2003 no its not OK. new one is $27. probably get one at the junkyard for 5 Quote Link to comment Share on other sites More sharing options...
Cutty Hertz Posted May 21, 2003 Author Report Share Posted May 21, 2003 Ok. Thanks! Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted May 21, 2003 Report Share Posted May 21, 2003 I dont think the car will run without the MAP. When I broke the vacuum line on mine changing the plug wires it wouldnt even stay running for more than a few minutes Robby Quote Link to comment Share on other sites More sharing options...
GnatGoSplat Posted May 21, 2003 Report Share Posted May 21, 2003 Yeah, I don't think the car will even run with it unplugged. Never tried, but I doubt it will. Your speedo didn't work? You went from base digital to gauges digital, right? Your speedo should work, you might have to go over those pinouts again. The tach won't work until you splice into the orange ALDL wire and plug it into the appropriate input on the cluster. Quote Link to comment Share on other sites More sharing options...
Baddflash Posted May 21, 2003 Report Share Posted May 21, 2003 Your car will probably run but not good if at all, the computer needs those readings to help determine the fuel mix, etc .... What was the problem that you thought the fuel pump was bad? I ran into problem on 2.8l MPFI that I thought the fuel pump was going so I changed it, after car was flooding and only ran right at redline. After many times switching the pump I figured out the pressure regulator on fuel rail was the problem. Quote Link to comment Share on other sites More sharing options...
Cutty Hertz Posted May 24, 2003 Author Report Share Posted May 24, 2003 You'll go to hit the gas, and it'll just die down, and if you keep on the petal it'll cut off. Is the MAP sensor located on the rear of the motor on top to the left, and does it have a green three-pronged plug coming from the bottom? The speedo was out before the gauges cluster. It stopped when I hit a bump a while ago. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted May 24, 2003 Report Share Posted May 24, 2003 Is the MAP sensor located on the rear of the motor on top to the left, and does it have a green three-pronged plug coming from the bottom? Yes. Quote Link to comment Share on other sites More sharing options...
Lee Posted May 24, 2003 Report Share Posted May 24, 2003 On the tach orange wire splicing....it was real tight for a splice for me so I tucked it up into the orange wire slot of the ALDL diagnostic connection, taped the wire against the ALDL housing, then put the cover back over it. I know it is a lazy way but it worked and saved me some bend down and look up time. Quote Link to comment Share on other sites More sharing options...
Cutty Hertz Posted May 26, 2003 Author Report Share Posted May 26, 2003 On the tach orange wire splicing....it was real tight for a splice for me so I tucked it up into the orange wire slot of the ALDL diagnostic connection, taped the wire against the ALDL housing, then put the cover back over it. I know it is a lazy way but it worked and saved me some bend down and look up time. Arer you reffereing to the sensor for the speedo/RPM gauge? Quote Link to comment Share on other sites More sharing options...
Lee Posted May 26, 2003 Report Share Posted May 26, 2003 When you have the base set of guages or the analog (dial) guages, the tachometer wire is a white wire from the engine compartment. When you switch to the UB3 cluster (full digital) that wire is no longer used. You have to splice into the orange bi-directional serial data wire from the ALDL diagnostic connector under the dash by your right knee. This provides the info from the computer to the dash rather than from the engine/sensor. Shawn had said to splice into that wire and plug it into the appropriate pin-out in the dash cluster connector. The correct one is listed on his site. My Regal plugs into a different pin-out than a Cutty but I do know that my orange wire [not the orange 640] for the tach was a different slot than the original white tach wire. Quote Link to comment Share on other sites More sharing options...
Cutty Hertz Posted May 28, 2003 Author Report Share Posted May 28, 2003 Yeah bu t the speedo wasn't working BEFORE the gauge cluster dash. I bought a MAP sensor today and installed it. It started to do the EXACT same thing it was doing with the bad one plugged up! What is that!?!?!? Quote Link to comment Share on other sites More sharing options...
GnatGoSplat Posted May 28, 2003 Report Share Posted May 28, 2003 Does the cruise control work? It could be either a bad VSS or bad ECM. Quote Link to comment Share on other sites More sharing options...
Cutty Hertz Posted May 28, 2003 Author Report Share Posted May 28, 2003 Nope. Cruse control doesn't work. SO which do you think it is? Quote Link to comment Share on other sites More sharing options...
GnatGoSplat Posted May 28, 2003 Report Share Posted May 28, 2003 It could probably still be either. I would start with the VSS because it's cheaper. Quote Link to comment Share on other sites More sharing options...
Cutty Hertz Posted June 2, 2003 Author Report Share Posted June 2, 2003 What exactly is a "VSS"? Quote Link to comment Share on other sites More sharing options...
Cutty Hertz Posted June 3, 2003 Author Report Share Posted June 3, 2003 O a "Vehicle Speed Sensor" Quote Link to comment Share on other sites More sharing options...
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