It has a new carb, coil, fuel pump and oil, but runs rough and then dies unless I keep nursing the gas to keep it running. When I push the accelerator it misses and lacks power. Occasional backfire.
I store it most of the year. Got it out and it is running like this. I can turn a wrench and do the basics but am no mechanic. Thanks
What type of ignition system are you running? Point? Electronic? Pull the plugs and attach photos. Need to know if it’s rich or lean…symptoms sound lean
Points. I pull plugs today and send pics. Much appreciated
I just changed the fuel pump because it was leaking gas into the oil.
Also changed oil and filter after the pump was replaced
how old is the gas?
And did you try changing your fuel filter?
Also, you said you have a new carb. Have you adjusted it in yet?
Gas is new rec90. Fuel filter was also changed. I have not yet adjusted the carb.
Turn the idle adjustment mixture screws in to slow fuel at idle. That’s ridiculously rich. Little weird about one plug that looks goodish. I only count 5 plugs. Please lay them out by bank and label them. Thx
A 70 351w? I thought the 70’s got the 351c?
And yeah, pig rich on the black plugs. What carb?
Mike,
Early 70 Cougars and Mustangs ordered with a 351 2V got the Windsor 351. And it’s noted on my Marti report for my 70 XR-7.
Holley 600cfm street warrior is the carb. Thanks
This was rebuilt back in the 80’s. That’s when the 4 barrel was added. I’ve had it 45 years. Bought the car when I was 15.
Time for another carb rebuild.
Another internet legend disproved…
Thanks to all who took time to lend advice. I adjusted the carb (leaned) and new plugs and voila, she’s running pretty good.
Any idea when the factory switched the 1970 H code standard engine from 351 2V Windsor to 351 2V Cleveland?
Kevin Marti has addressed that in one of his FAQ’s on his website.
Marti Auto Works - Concourse Quality, Hobbyist Price
He has multiple FAQ up there and quite a few I found very interesting.
This is what Kevin says;
"It was a random event at each assembly plant based mainly on the ability of the Cleveland engine plant to supply engines to the assembly plants. As cars would be lined up on the Trim and Chassis line and the build sheets were printed, Ford recorded which engine they installed in each vehicle based on availability of stock received from the engine assembly plants.
Originally, they were going to assign the letter “H” to 351 Clevelands and the number “8” to 351 Windsors. But they dropped the idea and used “H” for all engines.The Cleveland was to be the default engine; that is, as long as there was availability, they would install 351-2V engines from the Cleveland plant as this was a new engine design and they wanted to deliver as much product as they could to recover their investment in the new engine design.
No record was given to the customer as to which engine was installed, but Ford recorded it for themselves.
We have the data available. When someone orders a report from us with an “H” engine code for 1970-1973 models, the report lists if it had a Windsor engine. If there is no listing, it had a Cleveland engine since that was considered “standard.”
