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In my never ending quest to get my car running right, could somebody confirm my ideas on the o2 sensor-EHA relationship Am i right in thinking that if the o2 sensor detects rich running, it will adjust the EHA via the ecu, and cause my cut out at warm temperature?, ive tested the sensor, and...

Got it, underneath the air flow meter......didnt stop the surging though:(

Thanks Graeme, ........could that tube be the culprit with a surging problem?

Still trying to get my coupe running right........ive just found this going nowhere,

THANKS HOTTRODDER, i will take a look in the morning what i dont understand is with the EHA disconnected the car runs fine with the TPS disconnected the car runs fine with the ICV disconnected the car runs fine the only thing i can see that links all these is the ecu, though i have...

Guys, i think i jumped the gun when i marked my earlier thread (w124 expert needed) solved! ive spent hours on this car, and exhausted the net of info, your thoughts please Originally the car (300ce 1992) got up to temperature then died instantly, with the help here, it was narrowed down to...

I had a meter on the unit and the voltage swept from about 0.5volts to 4.5volts without any spikes, this is not the way to test though, as Graeme pointed out to me. at closed throttle there should be resistance between pins 1 and 2 (closed switch), the old unit did not do this, I had assumed if...

Thought i would add this footnote, as it may help somebody in the future. First my thanks to Graeme for nursing me through this problem. The culprit was indeed the throttle position switch / sensor as mentioned early on in this thread. A new sensor fitted today and all is well......fiddly...

This is related to my recent thread (w124 expert needed) A very kind member here has just nursed me through this problem and i have just confirmed that the fault i have is down to a faulty throttle position switch. My question is has anybody fitted a new switch to the throttle body?....i have...

I hope nobody minds me rattling on about this problem here, but its driving me nuts!, today has been my first chance to work on the car. I have checked the micro switch on the throttle linkage, as this was said to be the most likely cause, with a meter it opens and closes, then i put the wiring...

I hope nobody minds me rattling on about this problem here, but its driving me nuts!, today has been my first chance to work on the car. I have checked the micro switch on the throttle linkage, as this was said to be the most likely cause, with a meter it opens and closes, then i put the wiring...

This is what i done, firstly i was worried when it was mentioned that the unit could have been damaged during a jump start (KE UNIT) so first thing this morning i tried another ke unit that i was lucky enough to have. the symptoms were the same, so i could rule out the ke unit. so i then tried...

Thanks Graeme for all this info, the pdf looks daunting:o i need to spend the afternoon in the garage

He certainly does, he helped me out years ago with an old 300e i had (best car ive ever owned)

Many thanks to all you guys that are following my problem, i need to update you. there was a new cap and rotor arm fitted when the work was carried out (GENUINE) i have checked both fuses on the ovp relay first thing this morning, i swapped the ke unit for an exact part i had from a previous...

Thanks guys for all these replies,i do appreciate it, will try removing EHA in the morning

work carried out test battery fit new battery! test fuel pumps priming ok strip down inlet side remove and clean fuel metering head clean inlet manifold inspect all vacum pipes and electrical connections fit new water temp sensors fit new plugs fit new cap set up fuel air mixture oh...

thanks Graeme for a very comprehensive reply, the fault is not intermittent, it happens exactly the same everytime the car is started there is something i should add to this, if you would please comment ive only just bought this car, from a guy who had this fault, he sold me the car along...

Ive just been into the garage, the car is cold so i removed the air filter , started the car and waited for the temperature to rise, sure enough 85 degrees and it died BUT I WAS WATCHING THE ENGINE, the flap on the throttle body just dropped killing the engine, then rose again?????car started...

its as soon as it warms up, its not like a stall, it is so abrupt, but when you start it again its fine, like something is getting warm then making or breaking a contact but resetting itself after the ignition is turned