Engine started idling and running rough after filling up tank
I filled up my gas tank and drove about 15 miles before parking my car for about 8 hours. Got back in my car and it started idling really rough, missing, and loss of power. I have added 93 octane gas to the tank as well as a seafoam treatment, replaced the fuel filter and cleaned the injectors themselves with seafom by pulling the harness and wiping them .
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Since it is an older vehicle, check under the dash for any "rigging" that might have been done over the years. Start at the battery and follow all electrical wires that lead into the dashboard and fuse panels and check for any frayed or split lines that might be causing you to have a short circuit somewhere. that's what it sounds like to me. Unless you have a huge sound system with some 15" woofers in the trunk you shouldn't be experiencing any power shortages.
You never leave a car running, as it will overheat the Exhaust Converter When you run out of fuel, you sometimes ruin the Fuel Pump It depends on gas to lubricate it,as strange as it sounds Check fuel pressure & volume at the motor with a gauge
ill reduce it for you.
misfires. (is RPM below 700 then misfire can be normal) for idle speed controls dead.
ISC the isc controls speed, of idle,.
mine stuck like zillion times, in 400k miles. endless.sticking
mine was a tiny gutless stepper motor drive ISC valve.
the cone valve is side gets nasty and sticks (
(PCV gases caused as seen on all engines)
i clean it.
the proof is the easy press of right foot easy raises idle back to 700rpm and engine stops misfiring.
ever get a tuneup this decade or running spark parts 500,0000 miles
for the new world record.?
now the tricky part of ISC, , fully explained in the SM serv. man.
the PCM learns its behaviors.
it learns all hot start settings and cold
so when you key on, it goes to the correct HISTORICAL spot.
if it can move there(sticks) engine car race.
or run too slow,
cold start would be worse, as hot isc is more closed
so if sticks there closed, the next cold start will be horrid
some newer manuals telly you to add 5% throttle if car is hard starting this is so common.
When stored outdoors for any length of time, you can get a substantial amount of condensation to form inside the fuel tank (as much as a half gallon) It will remain at the bottom of the tank and really mess with how it runs. Check fuel filter...Pour contents into a clean glass jar...If any water is found at all, you can bet there is quite a bit in the tank.