BRONCO200144 Posted February 4, 2013 Report Share Posted February 4, 2013 how can i calibrate the TPS on my cadi 87 eng 4.1L. When I stop the Idle speed is to low and the Red STOP ENG LIGHT illuminated .The amber SERVICE SOON LIGHT illuminated . I have code E55 . Link to comment Share on other sites More sharing options...
Safari2000 Posted February 6, 2013 Report Share Posted February 6, 2013 The TPS is generally spot welded in place unless someone has had the DFI unit off. Are you sure it's not the ISC out of adjustment?? You could back out the plunger screww and see if that gives you the extra rpm you need. Link to comment Share on other sites More sharing options...
KHE Posted February 6, 2013 Report Share Posted February 6, 2013 how can i calibrate the TPS on my cadi 87 eng 4.1L. When I stop the Idle speed is to low and the Red STOP ENG LIGHT illuminated .The amber SERVICE SOON LIGHT illuminated . I have code E55 . waterzap has a 1987 shop manual - Sent him a PM and he should be able to send you the TPS adjustment procedure. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
waterzap Posted February 8, 2013 Report Share Posted February 8, 2013 There are two little screws. I had to adjust it once, I dont remember how I did it. Will have a look this weekend. Link to comment Share on other sites More sharing options...
waterzap Posted February 11, 2013 Report Share Posted February 11, 2013 You have to measure voltage between one of the pins and ground. When the throttle is closed, should be around 0.5 volts. Fully open is 5 volts Link to comment Share on other sites More sharing options...
Safari2000 Posted February 15, 2013 Report Share Posted February 15, 2013 There is also a Idle screw that you can adjust the idle level. The screw is under the SC motor and a bit hard to get at, I had to up my idle a bit as the ISC wasn't doing the job. Link to comment Share on other sites More sharing options...
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