ford related...ford M block 400 v8 June 26, 2007, 09:31:17 PM I've had my '78 bronco on the road for 2 weeks with no problem then out of nowhere it started sputtering, and stall when no throttle is applied, have to hold it to the floor when I start it, even then it just chugs belching the ol' black smoke out of it. going down the road about 1/2 throttle it runs good, but I let off and it stalls. I set the carb up right. Duraspark maybe?Engine:Ford 400Mholley street avenger intakeEdelbrock 600cfm manual choke-fresh rebuildMSD cap/rotornew plugs/wires Quote Selected
ford related...ford M block 400 v8 Reply #1 – June 26, 2007, 09:34:06 PM not likely, vac advance hooked up? dist. bolt tightened down? did you install the timing gear "straight up"the duraspark II is pretty reliable.try asking here: http://www.ford-trucks.com/forums/forum54/ Quote Selected
ford related...ford M block 400 v8 Reply #2 – June 26, 2007, 09:38:19 PM Quote from: HAVI;157052not likely, vac advance hooked up? dist. bolt tightened down? did you install the timing gear "straight up"the duraspark II is pretty reliable.try asking here: http://www.ford-trucks.com/forums/forum54/I didn't have the engine apart so I do't know about the timing gears, the dist is tight.the advance was hooked up last I knew Quote Selected
ford related...ford M block 400 v8 Reply #3 – June 26, 2007, 09:40:06 PM How hot was it? putting 1/4" spacers behind the spark box on the fenderwell is a plus to keep it from frying. Quote Selected
ford related...ford M block 400 v8 Reply #4 – June 26, 2007, 09:41:22 PM like 80 degrees yesterday (monday) Quote Selected
ford related...ford M block 400 v8 Reply #5 – June 26, 2007, 09:43:46 PM it's odd...I let off it sputtered, I put it in N and revved it...cleared up, was fine till I hit the brakes and came to a stop then stalled Quote Selected
ford related...ford M block 400 v8 Reply #6 – June 26, 2007, 09:45:33 PM FWIW, try my link, these guys know their 335 series engines. If you don't want to register, and/or can't posta question, I can post it for you, but right now I have to get my wife at the airport. So it wouldn't be til tomorrow afternoon. Quote Selected
ford related...ford M block 400 v8 Reply #8 – June 26, 2007, 09:48:18 PM http://www.ford-trucks.com/forums/forum54/ Quote Selected
ford related...ford M block 400 v8 Reply #9 – June 29, 2007, 06:09:14 PM I had this problem in my cougar but its been a while. try running some seafoam down your carb to clean everything. it may be possible that your float could be sticking if it has sat for a while. Quote Selected
ford related...ford M block 400 v8 Reply #10 – June 29, 2007, 06:22:53 PM Motercraft carb?,has the outside gas pump,they drye out .78's I have fond memorys with them,It could be the box,solved many of my problems.Probably has the blue wire connector. Quote Selected
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