New 400 engine, stops running at idle with no warning, what is it?

Asked by Mar 17, 2011 at 01:10 AM about the 1977 Ford Thunderbird

Question type: Car Customization

Engine: 400 / 6.6L, 4.040 bore, EB performer dual plane intake, Holly 600cfm 4bbl with 1" open carb spacer, CompCam cam w/ 262 lift, with matching hydro lifters, push-rods, springs and roller-rockers. An HEI distributor @40,000v. PROformance plug wires, and Autolite spark plugs.
Starts good and idles good for about 3 or 4 mins. Then with no warning, it stops running, theres no sound like a howl or a squeak when it does. When it stops i can't re-start it until about an hour has passes. The battery is verified good, alternator is good, HEI is good or it wouldn't run, Ive adjusted the carb up and down and will do it on lean, rich or (just right). Someone with more under their belt than me (experience wise) throw me a bone... what is it im missing?

2 Answers

CHANGE YER OIL.

1 out of 1 people think this is helpful.
135

with a built head you may run in to problems with timing and/ or fuel problems. Check your lift on your cam could be to much for engine to handle believe it or not.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Search Ford Thunderbird Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Ford Thunderbird Experts

#1 oldtimer37
oldtimer37
Reputation 1,440
#2 Tom Demyan
Tom Demyan
Reputation 1,430
#3 tennisshoes
tennisshoes
Reputation 1,100
View All

Related Models For Sale

Used Ford Mustang
577 Great Deals out of 42,797 listings starting at $1,699
Used Chevrolet Corvette
289 Great Deals out of 20,545 listings starting at $3,688
Used Chevrolet Camaro
445 Great Deals out of 40,684 listings starting at $3,500
Used Dodge Challenger
340 Great Deals out of 25,161 listings starting at $7,988
Used Ford F-150
3,075 Great Deals out of 208,275 listings starting at $1,200
Used Mercedes-Benz SL-Class
68 Great Deals out of 3,126 listings starting at $4,000
Used Pontiac Firebird
17 Great Deals out of 776 listings starting at $2,495
Used Mercury Cougar
232 listings
Used Chevrolet Impala
935 Great Deals out of 35,377 listings starting at $1,700
Used Porsche 911
136 Great Deals out of 4,468 listings starting at $8,901
Used Dodge Charger
497 Great Deals out of 30,244 listings starting at $2,275

Used Cars For Sale

2005 Ford Thunderbird For Sale
83 listings starting at $9,500
2004 Ford Thunderbird For Sale
5 Great Deals out of 160 listings starting at $7,998
2003 Ford Thunderbird For Sale
6 Great Deals out of 149 listings starting at $8,890
2002 Ford Thunderbird For Sale
14 Great Deals out of 309 listings starting at $6,995