Hey guys, ive had a few weird things pop up on my EL fairmont, the one im trying to solve at the moment is the issue of the trip computer not reading correct. Got a few things it returns which are dodgy;
1. Half a tank of fuel, DTE (distance till empty) or "range" reports it as only having 74km to travel.
2. When checking the current fuel usage (first on the menu) it is very erratic, i know for a fact that off throttle while on the highway (or similar) it used to report around 3-5L per 100km, the problem is now instead of returning to single figures it actually increases as i lift off the throttle. It generally seems to return to around 20L which shouldnt be correct when im not even touching the throttle and it is just coasting along.
The same thing happens when stopped, sometimes it wont even return to zero when stopped at the lights, other times it takes a good 20 seconds of spitting out random numbers before it hits zero. I have taken a fair bit of notice what it used to read (first got the car i was driving around trying to break into the hundreds
), and i know it isnt functioning properly.
I was wondering just how does the trip meter calculate these functions? is the current usage a simple matter of throttle position? (taking a reading from the TPS sensor for example) or is there more to it than that? What about the range? i know it changes depending on current fuel usage (drive hard, it drops, back off, it increases) so does it just calculate how many L in fuel is currently in the tank, then compares it to current usage and spits out the result?
Im just wondering because the more i think about it the more i think i might have a TPS issue, the idle is high (and plain nasty) and it is sluggish to take off. All this dissapears when switched to gas.
Anyone had similar issues? any way to reset the trip computer and start fresh (i assumed you could remove the battery terminal but then i was wondering if it had a battery backup like the odometer).
Thanks for your time :)
Now i have to spend this morning working out what the hell happened last night when, over the duration of about 20 mins, it steadily lost oil pressure until it was just about to hit the red mark when i pulled into my drive (just as i turned it off the light flickered on) :sad: It sounded noisy too when i listened to it in the driveway, i have a feeling it really is a oil pressure issue