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NOTE: Only have a multimeter and jumper leads for diagnostics; tools are at home...
Fuel pump, main relay & ECM replaced recently for a cranking no start condition. Fuel filter and vehicle speed sensor were also replaced just to be transparent. Car was running great after the services.
Problem appears to happen when warmed up & driving around and is fairly inconsistent. Sometimes when coming to a stop, sometimes when taking off other times just while cruising. Pedal to the floor doesn't do much to keep it running, sometimes when lucky putting it in Neutral and revving it will keep it going. Generally it will start up quickly after stalling and drive for a min or two then start to act up again.
I wanted to say fuel but the systems been revamped already. So could the coil be shorting out when it gets hot? Maybe a leaking fuel pressure regulator which I'll try to check tomorrow. Any leads would be much appreciated; this car is fighting me all the way!
The fact that it's only doing it when the engine is warmed up kinda makes me wonder about the O2. My thinking here is that, after it goes into closed loop, the O2 is going lazy and causing the ECM to take too much fuel away at times. Combine that with some changes in load (coming to a stop, accelerating), and you end up with a stall. The programming in these ECM's was not the sharpest, and would frequently fail to code for a bad O2.
I understand you're limited on test equipment, so I'd suggest just unplugging the O2 sensor and going for a nice long drive. The CEL will come on, but that's OK. If the symptom is gone, then I think we're on the right track. If it persists, then we can go in another direction.
With 1992 Honda cutting out when warm my first move is always to check for a failed solered joint on main relay's circuit board. I saw an awful lot of these fail on the early 1990's Honda engined Rovers which were essentially Civics. I know this was already changed but it still is top of the hit list.
The Honda main relay box usually has two relays on the circuit board one for the ignition the other for the injection system. They can usually be repaired if you can solder, if not *** buy a new one *** as one from a salvage yard is likely to be ready to fail.
ISTR Paul has couple of videos on this if you search on Youtube for "Honda Relay Scannerdanner" it should turn up the Vids.
" We're trying to plug a hole in the universe, what are you doing ?. "
(Walter Bishop Fringe TV show)
Last edit: 8 years 8 months ago by Andy.MacFadyen.
Andy.MacFadyen wrote: With 1992 Honda cutting out when warm my first move is always to check for a failed solered joint on main relay's circuit board. I saw an awful lot of these fail on the early 1990's Honda engined Rovers which were essentially Civics. I know this was already changed but it still is top of the hit list.
The Honda main relay box usually has two relays on the circuit board one for the ignition the other for the injection system. They can usually be repaired if you can solder, if not *** buy a new one *** as one from a salvage yard is likely to be ready to fail.
ISTR Paul has couple of videos on this if you search on Youtube for "Honda Relay Scannerdanner" it should turn up the Vids.
Here's one!
I'd like to add that I have seen the distributors fail when hot. Mainly the ones with the coil under the cap. So it's not totally out of the realm of possibility. I also like Tyler's and Andy's suggestions.
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