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aficio · 06-20-2013, 01:51 PM

1987 7.4 tbi. All, my truck broke down on my daughter and but i was able to limp it home by driving it for a mile or so then it would die. let it cool and do it again. the ignition module was gone. I replace the module but now it acts like it is not getting enough fuel, when i first start it cold it seems okay but it warms real quick then if i try to press the gas down anymore that an idle while driving it acts like it is not getting enough fuel. If i kick it it just gets loud but does not react. I was wondering if it is possible that the new module went bad at the points for the hall effect sensor. Any thoughts.
Both fuel pumps and screens were changed out last year by me, both sides with a new valve. This started right after i installed the new ignition module and test drove it. IT HAS BEEN RUNNING GREAT UNTIL THE MODULE DIED.
I read where someone had broken a vacuum line and it acted like my problem and since i had to go over the engine to put the module in i checked all of those and also used a mirror to check areas that i could not easily see.
Okay i put in another ignition module, i have also checked the Map sensor and just tested the truck with the map and EGR disconnected. I still have the same problem. I did not test the pickup wires since i can only check continuity. The problem seems like fuel starvation. i am thinking about changing the fuel regulator but i cannot think of a logical reason to do so and in why it would be causing the problem since I DID NOT HAVE THE PROBLEM UNTIL I CHANGED OUT THE BAD IGNITION MODULE.
The truck does not die, and starts up fine it is when i am driving down the road it act like it does not get enough fuel, tested the fuel pressure today and have a constant 13 psi. I guess i am about to the point of pulling the distributor and checking the pickup. The only other thing i have done, was to replace the injector pig tails, Okay today i installed a new pickup coil just to find out i have the same problem.
It just seems like it is not getting fuel except at a idle or low Rpm. Can the fuel regulator go bad to where it restricts the fuel enough to create this problem?
When you press the accelerator it does not miss or die it just does not pickup speed or rpm.

06-20-2013, 01:51 PM	#11
aficio Registered User Join Date: Nov 2010 Location: San Tan Valley AZ. Posts: 22	Re: Possible ignition module problem 1987 7.4 tbi. All, my truck broke down on my daughter and but i was able to limp it home by driving it for a mile or so then it would die. let it cool and do it again. the ignition module was gone. I replace the module but now it acts like it is not getting enough fuel, when i first start it cold it seems okay but it warms real quick then if i try to press the gas down anymore that an idle while driving it acts like it is not getting enough fuel. If i kick it it just gets loud but does not react. I was wondering if it is possible that the new module went bad at the points for the hall effect sensor. Any thoughts. Both fuel pumps and screens were changed out last year by me, both sides with a new valve. This started right after i installed the new ignition module and test drove it. IT HAS BEEN RUNNING GREAT UNTIL THE MODULE DIED. I read where someone had broken a vacuum line and it acted like my problem and since i had to go over the engine to put the module in i checked all of those and also used a mirror to check areas that i could not easily see. Okay i put in another ignition module, i have also checked the Map sensor and just tested the truck with the map and EGR disconnected. I still have the same problem. I did not test the pickup wires since i can only check continuity. The problem seems like fuel starvation. i am thinking about changing the fuel regulator but i cannot think of a logical reason to do so and in why it would be causing the problem since I DID NOT HAVE THE PROBLEM UNTIL I CHANGED OUT THE BAD IGNITION MODULE. The truck does not die, and starts up fine it is when i am driving down the road it act like it does not get enough fuel, tested the fuel pressure today and have a constant 13 psi. I guess i am about to the point of pulling the distributor and checking the pickup. The only other thing i have done, was to replace the injector pig tails, Okay today i installed a new pickup coil just to find out i have the same problem. It just seems like it is not getting fuel except at a idle or low Rpm. Can the fuel regulator go bad to where it restricts the fuel enough to create this problem? When you press the accelerator it does not miss or die it just does not pickup speed or rpm.