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Discussion Starter #1
This is about the 10th time this has happened. I am sick of this. I've gone through this forum and replaced everything suggested except the truck itself. I have replaced all the following in the order listed.
1 - Gas Cap
2 - Ignition Coil
3 - Ignition Switch
4 - Crankshaft Position Sensor
5 - Have a distributor ignition pick-up coil on order.

Here's what happened first. Drove about 20 miles, went in store for about 10 minutes. drove back home. It momentarily sputtered and cut off in my driveway right as I was getting ready to cut it off myself. Would not start back up until waiting about 5 minutes. There was a strong smell of gas near the tank but not under the hood. I just dismissed this as a fluke.

Next time. Drove about 40 miles with few stops, but when slowed down into slower traffic it died again. Same gas smell, restarted in about 5 minutes.

Next time. Drove 13 miles, stopped at stoplight for about a minute, then it just cut off without any warning. In the middle of the worst, busiest part of town at the busiest time of day. I called 911 on this one. In about 5 minutes, before help arrived, got it restarted and moved off the road. Died 3 more times on the way back home.

After replacing all 4 of the items above, one by one, test driving, it continues to die. Today, drove it 12 miles, stopped at a stop sign, and it died. Five minutes later, it started.

What has become clear and repeatable after 10 or 12 times is that something is heating up, then malfunctioning. A brief cooling and it is ready to repeat itself. As long as the truck is going down the road constantly at 50 to 70 mph it seems to be fine. Once the vehicle stops and there is no air circulation, it heats up and dies.

The engine runs perfect. Is has yet to throw any codes, and except for the sputter the very first time, it never give any warning. I just grit my teeth when I come to a stop, because I know the chances are that it will die right there.

It is easy to see how the coil or crankshaft position sensor could malfunction and open up when heated, then work again when cooled, but these weren't the problem. The pick-up coil was replaced only about 15,000 miles back when troubleshooting a problem that ended up being the fuel pump, but I am willing to replace it again as this forum suggests. It will be here next week.

I cannot bring myself to suspect the fuel pump, simply because I can smell excess fuel. I am 90% certain there is an ignition problem. If the fuel was getting burned, then I probably wouldn't smell it, but I will keep an open mind at this point. As stated, the engine runs great, but it does seem to be getting much poorer gas mileage since this started.

I am an ex jet engine mechanic, disabled veteran, on a fixed income, so I cannot afford to take it to a dealer, as I have seen some do on this forum, and pay to not get it resolved (as I have also seen on this forum).

This truck has never failed to throw any codes for all kinds of issues, but it is being really stubborn here.

!!!ANY AND ALL HELP WILL BE GREATLY APPRECIATED!!!
 

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I had the same issue. I replaced the engine idle motor in the throttle body. Fixed. 15.00 part. It’s located on the back of the throttle body; firewall side. Not real obvious. It’sa good idea to go ahead and clean the throttle body and replace your gaskets.
 

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I had the same issue. I replaced the engine idle motor in the throttle body. Fixed. 15.00 part. It’s located on the back of the throttle body; firewall side. Not real obvious. It’sa good idea to go ahead and clean the throttle body and replace your gaskets.
I
 

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I had the same issue.If it has a aftermarket security or starting system-get rid of it. checkwhere any aftermarket wiring may of been clipped in. mine was the coil wire was cut down to a few strands. never a problem after repair. goodluck
 

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You might want to check the evap purge solenoid. If it's stuck open there is the potential for excessive fuel vapor & even wet fuel to be pulled in thru the vacuum port on the intake. By design the solenoid should be shut while the vehicle is at rest and at idle. The valve is opened at higher engine speeds so that any unstable combustion from variable concentrations of fuel vapors won't be felt. If this valve is open at idle where the engine vacuum is the greatest the effect is the same as running a lawnmower on full choke...it can stall the engine out & even flood it if the fuel tank is near full. Newer vehicles monitor the position of the valves pintle so it will set a fault if stuck...on your 97 a current was sent to the valve to open & it was assumed the valve would shut when the power was switched off.
Easy to test by trying to blow through the valve with the engine off. On the valve should be a combined connector with a line coming in from the charcoal canister & a hose going to the intake. Pull the connector off and put a section of vacuum hose to either port on the valve. You can try blowing thru it with your mouth of if your well equipped use a Mighty Vac to see if the valve holds a vacuum. If air flows at all..the valve needs to be replaced. You can also temporarily try driving the vehicle with a vacuum cap on the intake port where the purge line connects to confirm the extra vapor is the cause of the stalling.
 

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Discussion Starter #6
I had the same issue. I replaced the engine idle motor in the throttle body. Fixed. 15.00 part. It’s located on the back of the throttle body; firewall side. Not real obvious. It’sa good idea to go ahead and clean the throttle body and replace your gaskets.
Thank you for this suggestion. This was also suggested a few days earlier in another forum. This was the first to make any sense based on the symptoms. I drive the truck very little so it took a while to get around to it. I replaced the idle air control solenoid, and cleaned the port it came out of with carb cleaner. So far so good but only time will tell. For the first time in the last few trips, it NEVER cut off. I only drove it a total of 38 miles, and it was a rather cool day, 73° was the high. Had it been 90°, I would be more confident. I will try to give an update when I have more information. Thanks again.
 
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