so my truck just dies on me while driving yesterday. checked everything to do with the fuel system and it wasnt that than checked brain box. the timeing and spark but still nothin. any one got suggestions?
my truck cranks and cranks but it just wont pop over. than we tried switching the brain box with my dads truck since its the same exact truck. still nothing. not a single code popped up either. no check engine light came on. checked fuel pressure with gauge and it read bout 48
I have had sudden and severe death of ignition coils before, and I always, these days, carry a spare behind the seat, cheap insurance, especially when you are far from civilization, they don't take up a lot of space, cheap chinese parts are , well, you really do seem to get what you pay for these days...
compression is still good we just got done checking. only has 97,000. i will see if the rotor is spinning or not im pretty sure it is because multiple plugs have spark. we dont know what it could be anymore. any other suggestions would be very helpful
If you can check of power right at the fuel injectors, that will test the wiring from the Auto Shut Down Relay to the injectors. There is at least one splice point that if bad would remove power form the injectors and cause this exact symptom.
The basics -
Air - I'm pretty sure you have that.
Fuel - Check
Spark - Check
Compression - Check
Details - (Timing) spark plug must fire when the piston gets to TDC on compression
Skipping the timing light, can you verify that #1 spark plug is firing when #1 piston is at the top of compression. I do this by removing the plug, putting my finger in the spark plug hole and turn the engine with a wrench on the crankshaft. You can feel the compression cycle when it starts. I continue to turn the crankshaft until the timing mark on the balancer lines up the TDC mark. Pull the distributor cap and see where the rotor is pointing. Hopefully it's pointing at #1.
yupp me and my dad did that test and the rotor was pointing at number 1. im going to talk to a couple mechanics today.the only thing that throws me off is that it never threw a code. no check engine light came on at all while driving down the road
By chance, did you try replacing the rotor. I have seen where the rotor develops a carbon trace through the center which partially grounds out the coil spark to the shaft of the distributor and weakens the spark enough to fail under compression. It still passes the 'color' test, but just doesn't have the energy.
You mentioned your dad has the same truck, so you could possibly borrow his rotor for testing. :4-dontknow:
yupp we put a new rotor on it last nite with a new cap and plugs. some people think its the crank shaft position sensor. but i haven't had the chance to replace that yet. hopefully gonna try that tonight.