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TPS Sensor


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I did quite a bit of work to my 98 V8 Esprit over the winter, which included, New Coils, new thermostat, new ECT sensor, New High Tension Leads, new spark plugs (Dont use the Iridium, stick with stock NGK's), new injectors and new fuel, oil and air filters. Put it all back together and the car and I were happy with the results.  Gonzo Mendoza was helpful with the plenum removal and coaching!!!   I did notice some slack in the throttle cable, so I put my code reader on it and tested it for wide open throttle or TPS at 100%.  It was at 76%.......I am sure I must have messed with it when I had it all apart.  The cable will let you adjust it where the rubber grommet attaches to the bracket on the back of the engine.  I needed to take the rear floor out for good access, but once you have done that it takes only 10 minutes.  I also had permanently installed a battery charger next to the battery and while I had the floor out I routed the plug wire under the floor and it is wedged in the rear underside air deflector.  Not a 100% sure I am happy with it, but it stops me from having to open the boot everytime I park the car and plug in the cord.  Once I adjusted the throttle cable and had the TPS at 100%,  the gas pedal was definetly tighter and more responsive, it was a little thing but the car now feels great.  Just wanted to share this and it is really easy with a code reader to check for wide open throttle.  Thanks Mark

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It will be a different car with 100% throttle !  When the cars were delivered new, the throttle was typically adjusted to only allow 3/4 throttle. There is an adjustable rod on the underside of the throttle pedal that provides a mechanical stop against pedal plate beneath.  It was supposed to be adjusted after the first oil change, but sometimes didn't happen.    Given the massive difference in performance, it's definitely worthwhile any owner checking that they have 100% throttle available.

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1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

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Funny you said that as I tried initially to adjust that stop, which is pretty easy even for my larger than life body. It was maybe a combination of both, but seemed like the excessive slack was at the engine end. You are 100% right, different animal. I had 1 empty cat and 1 clogged cat.....so now they are....test pipes and no muffler.  The turbos spool up quicker and better throttle response.....and in Colin Chapman's  honor.....a weight reduction.

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