I've got a 1987 F150 6 cyl, 67000 original miles. It stalled today, then wouldn't start. If it sits for awhile, it will start, but run for up to a minute. I can rev up the engine and everything sounds normal, but then it stalls and won't start again until it sits for awhile. It has a new spark plugs and wires, which were replaced 6 weeks ago, new alternator and battery 2 weeks ago, and I just replaced the fuel filter. Any ideas?

 

MikeFM58, when you get the truck started, try and see if there is alot of pressure at your tailpipe exit. Just put your hand(s) over the end BUT don't seal it completely. Get someone to try and rev it up to around 2000, if you can and see if the pressure increases. If the pressure doesn't increase, your catalytic converter might be plugged and need replacing OR removed depending upon your emission restrictions. If had the converter go on my '87 I-6 and it wouldn't let rev over 2000 without major vibration (bucking) because it couldn't get rid of the exhaust through the cat. It was building up too much backpressure and causing problems for the motor. You can also measure the back pressure with a guage to see if it goes too high, they should just screw into the O2 sensor location.

Have Fun & Keep on Truckin'
Dean

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1994 F-150 XLT Supercab, Long Box, 302 EFI, 3.55 LS, Superchip, K&N FIPK, Bosch Platinum +4 Spark Plugs, Automatic, Single Catalytic converter, followed by a Raven Z-55 muffler and finished off with chrome tips (2 1/2" to 3"), Royal Blue in and out, Captain Chairs. Chrome Rims 15x8's, BFGoodrich Radial T/A's 107S 275/60R15 (Summer), OEM Aluminum Rims 15x8's, Michelin LTX M/S 108S (Winter), Lightly Tinted, Soft Tonneau Cover, Ford Receiver Hitch Cover & Lock, J&J Enterprises Stainless Steel AirDam with KC driving lights, Lund Supersteps, Lighted Grab Bars, VTech Slotted Taillight Covers, Alpine CDM-7829 Head Unit, PPI 4800 Amplifier, Kicker 10" Solo Baric Sub with Custom Box and Kicker Impulse 6.5 Mid & Tweets.

 

I replaced the TFI Module, which is located on the distributer housing, working great now. The guy at Discount Auto Parts also said they sell lots of TFI modules. I also had to get the special tool to remove the bolts.



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1987 F150 with 67000 original miles.

 

Could be a fuel pump relay switch. I had the exact same problem in an 88 Ranger, and it ended up being a relay switch that was one of the little gray relays under the hood. Changed it out and it ran fine until I got rid of it, it had about 80,000 on it when it went out.

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1997 F150 Lariat Three Door Extended Cab Flareside 4x4, Two tone Pacific Green w/ Harvest Gold, Tan Leather Interior, Ford Premium Sound w/ CD Changer, Lund Solar Visor, Leather Tonneau Bedcover, K&N Air Filter, VentVisors
Wish List: Lund Racer Back Cab Spolier, Lund Shadow Winshield Wiper Cover, Lund Steps, RhinoLiner Spray-In Bedliner, Vortech Super Charger, Brush Guard, Hidden Winch, Lighted Ford Logo, I'll list more when I think of it...