Soarer 1jz injector signal problem.

[supbrah86.5]

So after a few months of running great, a developed a dead miss while driving home. So far what I've found is a dead miss on cylinder 2 and 6 which share the same signal from the ecu. I've swapped coils and plugs and the number 2 injector, the miss stays on 2 and 6. Additionally I overlaid the signal wires to 2 and 6. Using a power probe I'm getting a pulse on these injectors but not as strong as the working cylinders. I haven't moved the cylinder 6 injector because its a pain in the ass and I wanted to see if anyone has seen this before. Could an internal short in the number six injector cause disruption to cyl 2 as well? Or is it simply a blown ecu.

My other question is if it is the number six injector, can I swap it with just one 2jz injector until I get my tax return or is that dumb?

 

[hvyman]

If using stock injectors you need the 370's.

I would open up the Ecu before doing anything. Likely that a cap has leaked.

 

[supbrah86.5]

Looks like you're exactly right on this one. Going to solder a new one from a spare ECM and let you know. Good call sir!

 

[supbrah86.5]

Welp soldered in another capacitor and same issue. Gonna swap cylinder six injector with cyl 1 see if the issue follows

 

[hvyman]

Only 1 cap was leaking?

 

[Radial]

Would defiantly replace all caps if one was bad... less trouble later on.

 

[supbrah86.5]

Yep only one cap. Where do you get te right caps from? Clearly not radio shack. Is this definitely the issue?

 

[hvyman]

Have to go to an electronics store. Usually a small mom and pop store.

 

[3p141592654]

How are you testing the cap to know if it is is bad? You can buy caps online at mouser.com. digikey.com, newark.com, and so on.

 

[Radial]

to really test a capacitor, you need a "Oscilloscope". A very expensive tool for electronics.
Better off by just soldering in new caps, thats like...15$ in parts maximum.

Choose caps at the same size (Farad, Micro-farad, piko-farad etc..), but preferably higher voltage and Temperature ratings. Stock caps is usually low temperature rated (maximum 60c or so) and should really rated 80c in very hot climates.