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Discussion Starter · #1 ·
94 Shadow again:
Sometimes it runs fine, then at times it keeps cutting out, and stalling at lights.
Today it completely died on the road, after a bunch of the other stuff. Let it sit a half hour, it started, but I had to race eto keep it going. Then it was good enough to get home, but I had to keep racing it when ever it started to cut out.
Need help...
New pump, newer filter, newer tune up, newer distributor pick up.
The fuel gauge hasn't been right since I put the heater core in.
 

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1989 Shelby CSX
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Oohh, I had the exact same thing with my ‘89 CSX when I first bought it. Would die and had to wait before it would restart. Ended up being the temp sensor in the intake.
 

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I assume that this issue was present before you replaced the said parts.
"New pump, newer filter, newer tune up, newer distributor pick up."

Does it only stall on decel or at idle or will it happen at anytime while driving?
Are there any signs that the problem is about to happen or is it out of nowhere?
Will it restart immediately after stalling or does it have to sit before it will stall again?
 

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Discussion Starter · #9 ·
It occurs whenever. No warning. Hiccups, stops, starts again, doesn't start again, then later does.
Not present before, but not immediately after.
 

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When the car will not restart you need to determine if the issue is ignition, fuel or both.
When it stalls and will not restart check to see if you have 12 volts at the + coil while cranking.
It all sounds like a HEP issue to me, new does not always = good, especially with HEP's.
Be sure the wiring has not been bent, connectors are clean/tight, vanes are secure in the distributor and you may want to perform a wiggle test on the wiring.
 

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Yes,, it sounds like a bad HEP signal, so I agree with NAJ. It reminds me of the time I bought a used Dodge Shadow about 25 city blocks from my home. The lady was selling the car because the transmission only worked in Reverse and it would sometimes mysteriously die. I decided that since I lived about 25 blocks away I would just drive the car home in Reverse and save the cost of a tow truck. The plan included staying off the major streets and only driving on the less busy neighborhood streets where I could take my time and be careful. Everything went fine until a pedestrian saw me driving backwards and started yelling at me: "That's not funny!" he said. He thought I was a prankster just playing a trick. No, not funny, merely necessary. When I got home I received a call from the lady who had sold me the car. She was worried that I would not make it home. I told her that she was very kind and considerate, but I had made it home just fine. The next day I diagnosed the problem as a bad HEP (Hall Effect Pickup) and replaced it. Swapping out the Automatic transmission took a little longer.
 

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Did you get fixed Core? I had a similar issue once. The coil was breaking down when hot. I bought the car with the issue and was able to start and drive it 4-5 miles after adjusting the timing. I guess the adjustment compensated for the weak spark. Eventually it quit running completely though and the factory coil resistance was out of spec. $15 coil and I had a 1985 Aries with a load of new parts and factory manuals with 72K on the clock. I paid $175 for the car.
 

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94 Shadow again:
Sometimes it runs fine, then at times it keeps cutting out, and stalling at lights.
Today it completely died on the road, after a bunch of the other stuff. Let it sit a half hour, it started, but I had to race eto keep it going. Then it was good enough to get home, but I had to keep racing it when ever it started to cut out.
Need help...
New pump, newer filter, newer tune up, newer distributor pick up.
The fuel gauge hasn't been right since I put the heater core in.
Probably the dist pickup, be sure and not buy a cheap one
 

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Yes, I find it easy to pull out the center wire from the distributor cap and hold it about a 1/4" from a ground while the engine is turned over with the starter.. I use the stud poking above the timing belt cover as a convenient ground. Bright sunlight can make it hard to see the spark. On my father's pickup truck I was amazed to see sparks flying all over the plug wires at night, leaking high voltage current everywhere, and yet the truck still ran. Some people like to pull a plug and ground the plug and then watch for the spark. This is not wise because the sparkplug hole will be shooting out a mix of air and gas that might suddenly ignite. One tune-up shop had all 8 plugs out and reconnected to the plug wires to watch all of the sparkplugs sparking. They were oblivious to the danger, and they were even smoking cigarettes to boot.
They did not stay in business very long, probably because they had no idea what they were doing.
 

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Discussion Starter · #17 ·
Swapped the hep for a nib and still doing it.
It acts like fuel. Feathering the throttle, flooring it, etc will often get it going when it's dieing.
 

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The only way to know is to connect a fuel pressure gauge and go for a ride.

Again, if the car shuts down and will not restart that is your opportunity to find out what is missing (Fuel, Spark, Both) or if Fault Codes are present.

CHECKING FOR SPARK
Line Font Machine Auto part Gas

OR
Line Font Parallel Rectangle Slope
Product Rectangle Font Parallel Pattern


CHECKING FUEL PRESSURE
(91 1/2 - up TBI units are high pressure)
Rectangle Font Parallel Schematic Pattern
Handwriting Rectangle Font Material property Parallel
Font Parallel Art Pattern Paper
Rectangle Font Material property Parallel Pattern
Line Font Parallel Pattern Paper
Rectangle Font Material property Parallel Handwriting
Rectangle Font Parallel Slope Pattern


Last page will be posted below, can only attach 10 images to one post.
 
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