The first thing I did way back when was replace the O2 sensor as I didn't know how old it was. Couldn't find any record of it having been changed. Replacing it had no effect. However I don't know if there is an issue in the O2-ECU circuit. Not exactly sure where to begin with checking it with a dvom. The running/stumbling problem is not a deal breaker so I only work on it occasionally Sent from my iPhone > On Dec 7, 2016, at 10:07 AM, John Goubeaux <john@UCSB.EDU> wrote: > > Thanks, Since I've recently replaced the fuel tank, all the hoses and > grommets and lines and FP I'm gonna assume, unless i have bad fuel, that > the fuel supply is not the issue. > > I'm wondering though if the fuel pressure regulator can be intermittent > ? OR if it just goes all at once ? My understanding is that when it goes > the engine will run very rich as a result of the increase in pressure. > > >> On 12/7/16 9:41 AM, Don Hanson wrote: >> >> Water in the gas tank? Just did that... the expansion tank rubber >> grommets on my 84 were useless, and those expansion tanks are >> perfectly positioned in the wheel wells to collect water on their flat >> tops, with tubes to take that collected water back into the main tank. >> I surmised that as long as you're moving and the engine is >> running, the water in the gas is all mixed up and doesn't hurt the >> running but when you shut down for a while, the water that was in >> solution with the gas settles out, then when you start again, you get >> mostly water to run the motor.. >> I don't know if mine "seemed" to "show" rich symptoms, but bad gas >> and rich are similar in manifested symptoms... >> >> >> On Dec 7, 2016 8:51 AM, "John Goubeaux" <john@ucsb.edu >> <mailto:john@ucsb.edu>> wrote: >> >> In my case I've already replaced both the AFM and TB with rebuilt ones >> and had them adjusted, so I'm gonna rule them out BUT know they >> can add >> to bad running issues. >> >> -john >> >> >> On 12/7/16 8:46 AM, Dan N wrote: >> >> also...it could be a worn throttle body or a faulty throttle >> body switch >> |
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