Hi all, been having some severe issues with my Z32's throttle. It started as a hesitation every few minutes driving highway, cleaned all my sensor connectors and AFM and replaced plugs with OEM ones, problem faded away and now its back bigtime, car will lose all throttle for long periods (very embarressing/dangerous on a highway). Heres the thing, I got stuck about 2k from home, couldn't even rev the car above 3k, so I unplugged my TPS and drove home better than its ever driven before. My qeustion is, is it safe to drive with the TPS unplugged? I do plan on getting a new one (if faulty), but I want to do some more thorough testing to see if the hesition/throttle issues have truly gone away while the TPS is unplugged. Also will be getting a hold of a multimeter soon. P.S. I have cleaned the hell out of the contacts in the connectors and TPS with a wire brush and contact cleaner.
Yes it is safe to drive normally, don't get too happy with the right foot as the ecu response is not what it should be without a tps signal.
Cool thanks for the info. Did some further testing on the road with the TPS disconnected, no more stuttering, as soon as I reconnect it I get fuel cut staight away. Will voltage test it as soon as I get a multimeter.
By the sounds of this, you don't even need to bother with a voltage test... Chuck the bugger out and buy a new one!
Yeah I'm very close to that point. Just got a hold of a multimeter. Its entirely possible that the TPS was not set properly since before I bought the car. Also its possible that its not ground properly. Either way I find out after work today. Will post results for the benefit of googlers On a related note, does anyone know where to source a new TPS for a 1990 TT?
Also pays to check that the throttle linkages are synchronised properly. There's been a number of cases where the TPS was adjusted wrong to compensate for the throttles being wrong.
Okay voltage tests are in! Ground and Voltage tests from the TPS connector to the ECU are reading 0V and 5V so all good. From my readings the TPS itself is well and truly cactus. I can set it to 0.45V and hard idle on, but then any throttle movement the hard idle on will not turn back on, for it to turn on and off reliably the TPS voltage can only be set at below 0.34V, so that makes it broken. But theres more as well. TPS set at 0.45V apply throttle its spikes to 4V then dips to 0.8V and linear curve to about 3.8V, after that when the throttle returns to the close position it gets stuck on 4V rather than 0.45V. So I think I'm fairly safe in saying its game over for this sensor. PS thanks Josh Cool, have you have any experience ordering from those guys? USA to Aus delivery and all that?
They're great to order from, just make sure you message them before you order, otherwise they'll charge you the most expensive option for shipping
The shipping info was sent to me by them, all good. Just before I order does anyone know if Z31/R31/VL TPS will work instead? Seems to be a lot more of those floating around in aus. I assume they won't but doesn't hurt to know.
Well it depends on your shipping option and if they have the stock. I've ordered a number of times from CZP and they are usually pricey purchases so I just let them choose the shipping... Which is usually UPS Expedited. I have received my parts in 4 days!!! Twice!!! Lol. costs a bit, but as I said my basket is usually pricey so the cost of shipping kinda doesn't seem as bad lmao.
I had my TPS working at set on 0.45 though when cruising around an right foot isn't moving the TPS would occasionaly jump around up to 4.5v or so causing the same issues bogging down etc and triggering the ECU error. Replaced with another and no problems since.
New TPS installed and voltage tested! Thanks to mister chilledpain here for the quick parts supply Bit too late to test drive as I'll wake up the whole neighbourhood, will keep posted.
After 50km of testing have had no issues with the new TPS installed! Almost had me Nissan, almost. 300ZX:0 Me:1 :br:
