Faulty fuel filter caused mayhem on my ignition assembly?
Jul 23, 2018, 10:12 PM
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Faulty fuel filter caused mayhem on my ignition assembly?
Hi guys,
I really want to know what's going on in my Evo 5. It all started when my engine keeps going "putt-putt" when I'm cruising on the highway and every time it do so, I can smell a burning / melting plastic smell... I thought it was a vac leak at first. But after plugging the computer to my Haltech ECU, I realize it might be a fuel filter instead after logging after logging... so I changed it and the "putt-putt" went away as did the smell after a week later... Thought that was the end of it until last Friday my car wouldn't start.. it'll crank but it won't fire up. There was no electrical signal to my ECU, dash, indicators, fuel pump, etc... after 5+ hrs diagnosis, i pulled my entire ignition assembly and voila!!! It was toasted! Like completely burned / partially melted...
my question is.. could a dirty fuel filter cause that? I mean I know I drove with a dirty filter for a while... but that would cause the ignition assembly to fry up? Need some input from your expertise, cuz I don't want this to happen ever again...
thank you very much for your insights in advance!
I really want to know what's going on in my Evo 5. It all started when my engine keeps going "putt-putt" when I'm cruising on the highway and every time it do so, I can smell a burning / melting plastic smell... I thought it was a vac leak at first. But after plugging the computer to my Haltech ECU, I realize it might be a fuel filter instead after logging after logging... so I changed it and the "putt-putt" went away as did the smell after a week later... Thought that was the end of it until last Friday my car wouldn't start.. it'll crank but it won't fire up. There was no electrical signal to my ECU, dash, indicators, fuel pump, etc... after 5+ hrs diagnosis, i pulled my entire ignition assembly and voila!!! It was toasted! Like completely burned / partially melted...
my question is.. could a dirty fuel filter cause that? I mean I know I drove with a dirty filter for a while... but that would cause the ignition assembly to fry up? Need some input from your expertise, cuz I don't want this to happen ever again...
thank you very much for your insights in advance!
Jul 24, 2018, 01:18 AM
#2
I'm bot familiar with Evo 5, but I guess it's possible. If it is like Evo 8/9 where fuel pump power comes from fuse box (going to fuel pump relay #1). Fuel pump is working extra hard to overcome the clog. As it works harder, current (amps) increases. As amps increases, it causes voltage sag in entire fuse box. So every electronic getting power from fuse box needs to pull more current to make up for voltage sag. Over time, if you pull lots of power for additional electronics, it gets taxed. Also, realize that factory harness doesn't oversize the wires in order to keep manufacturing costs down, so once you start getting voltage sag, it keeps getting worse until fixed.
Jul 24, 2018, 05:26 AM
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I'm bot familiar with Evo 5, but I guess it's possible. If it is like Evo 8/9 where fuel pump power comes from fuse box (going to fuel pump relay #1). Fuel pump is working extra hard to overcome the clog. As it works harder, current (amps) increases. As amps increases, it causes voltage sag in entire fuse box. So every electronic getting power from fuse box needs to pull more current to make up for voltage sag. Over time, if you pull lots of power for additional electronics, it gets taxed. Also, realize that factory harness doesn't oversize the wires in order to keep manufacturing costs down, so once you start getting voltage sag, it keeps getting worse until fixed.
Jul 24, 2018, 03:42 PM
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yeah I wish I could've noticed earlier... now to source the ignition assembly which I'm having minor troubles with
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