Hey guys, it's been a while since I've visited the 'tex...
So yesterday I gave my girlfriend's '91 a full oil change and was happily driving it around - it's been working fine for the past few months. Last night it dropped to about -28C (-18.5F for you in the States), and this morning, when we tried to start it up, it cranked fine, fired right up, and then promptly stalled - the more times we tried, the longer it seemed to keep running before stalling. My initial idea was maybe the gas has gelled at that temperature and I neglected to put gas line antifreeze in it - and the gas tank was nearly empty, so I went and bought some gas and poured it in the tank. No change. Note that I do not have a block heater - if I did, it would be plugged in - I have one ready to install - that's my next project for when I have access to a heated garage.
It seems like fuel delivery is working properly, since it has enough to run for those few seconds that it does and every time it's restarted it gets another dose of fuel. I can confirm the pumps are running because I can hear them still running for a moment after the car stalls.
Engine is a 1.8L "RV" code (replacement for 2H by previous owner) with Digifant II
My ideas are:
fuel pump weak? doesn't make sense that it would happen so abruptly, it worked wonderfully yesterday.
blue CTS faulty? I unplugged it and tried to start it, it just started with less "pep" (I assume this disabled the idle stabilizer valve). Not sure what the proper resistance value across the terminals is for this temperature! the Bentley drops off at 0C
oxygen sensor? This is still the one that came with the car when we bought it a few months ago, so I cannnot vouch for its reliability...
Maybe it's the ECU or grounding? I haven't been able to thoroughly check this yet due to the weather and other plans but it's on the list...
Any ideas or experience would be wonderful.