This one's a corker !

Driving along, car starts coughing and behaves like there is no fuel. Like it is stumbling or starving.

It fees like a sudden drop of fuel pressure to the injectors - almost like the car is running but very very low idle then I take my foot off of the accelerator and let it sort of glide along and it picks up running again. Like there are water droplets going through the injectors and the car bogs down and sometimes it shuts off. Sometimes, If I FLOOR it it shimmies and coughs then starts running normal again. Sometimes it shuts off for like one second then starts cruising again. Sometimes I have to stop on the side of the road, wait like 3 seconds and restart it. It fires right up again. So, I am used to it by now. And I expect it. It does not backfire a bit. It sort of bogs into nothingness.

There were two separate faults when this was happening. I found one of them in the form of a nearly broken 12V Connector to the POS Battery Terminal. The fuel pump would only turn on sometimes, as we all know, you can hear the fuel pump load up when you go to KP II. It was intermittent and it was driving me insane. Anyways, I repaired the connector and then fuel pump turned on without hesitation to KP II. Thought it was fixed for sure so I am there with a shit eatin' grin when it started to stumble just like before, just to make sure I was good on the pump side

New Cap, rotor and wires. Made sure the little green connector was secure and clean where it connects to the side of the Distributor and it was. It starts as soon as you bump the key. 3/4 of a turn and it's running. I can assume the timing is spot on.

I took it out for a stomp road run which ripped the negative battery cable right out of the sub frame. So I limped home and fixed that up nice and tight with a new high tension 4 gauge copper ring terminal to the sub frame. Good to go for more stomp tests to see if it still stumbling. OF COURSE IT IS.

I installed a new fuel pump we bought from Don down the Cape. Went in worked no problems at all.

Used about 3 cans of dry gas in one tankful and it seemed to improve and the frequency of the stumbling was much less and performance was smooth and strong through the power band.

I have been using Sunoco Ultra most of the time and add one 12 ounce can of 108 Octane Booster and lead additive.

This is weird.

Rich






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'72 P 1800Es Wagon ::'92 740 B230F Wagon::'92 B230F 240::'86 B230FT Wagon (RIP-Parts Car):'83 320I::'79 320I::'81 320I::'74 2002::'70 Torino GT Convertible(351C)::1970 Dodge Dart GT 340::'70 Monte Carlo::1979 Dodge Tradesman B300 Custom(360)::'84 SAAB 900