Injector Trials & Wiring Woes
• Sivert • 8 views • 2 min read
For the past few weeks I have been trying to get my "brand new" injectors to work. One of them was stuck open, so I contacted the seller for a replacement. When he said "customer pays for shipping" I decided to try a different cylinder instead. One faulty injector out of four is odd, so we gambled a little. We installed all four first, and it turned out injector number 4 was bad.
| Cylinder | Injector Type |
|---|---|
| 1 | New injector |
| 2 | New injector |
| 3 | New injector |
| 4 | New injector (BAD!) |
To troubleshoot I swapped it for our original good injector (see my previous post).
| Cylinder | Injector Type |
|---|---|
| 1 | New injector |
| 2 | New injector |
| 3 | Original good injector |
| 4 | New injector |
I may have made another mistake putting the injectors back. I used dielectric grease in the connectors, which electricians use against debris and moisture, thinking it would help with the salt on our roads. Our electrician friend told me afterwards not to, so we tried to clean it out. Since then the engine misfires at idle but runs fine under load, and I suspect the grease. After a few days of driving and avoiding idling where I could, the misfire stayed in one cylinder. So I took the manifold off again, took every connector apart, and cleaned them with brake cleaner and compressed air. Then we put all four new injectors back, this time with the bad one in cylinder 1 to test it.
| Cylinder | Injector Type |
|---|---|
| 1 | New injector (BAD!) |
| 2 | New injector |
| 3 | New injector |
| 4 | New injector |
Cylinder 1 misfired, which confirmed the injector. I pulled it out and put the original good injector back in its place. The current setup is now:
| Cylinder | Injector Type |
|---|---|
| 1 | Original good injector |
| 2 | New injector |
| 3 | New injector |
| 4 | New injector |
Taking parts on and off five times in a row wore things out, and I ripped the cables off the boost pressure sensor connector on the boost pipe. You have to push the pipe down hard to get it off, and I did not notice the connector was still attached.
That meant a trip to the scrapyard for used connectors with wires. The space is tight and the wires are short, so I will have to splice them carefully.
More soon.