Fuel Injector Going Bad?, FIXED - Thanks 914 World! Options

[saigon71]

74 2.0 D-Jet. Car is in a fine state of tune. Verified fuel pressure at 30 PSI. Removed distributor, cleaned & lubed advance plates and tested vacuum canister. Verified TPS is set correctly. MPS tested fine. ORIGINAL fuel injection harness. I went around the engine bay today and re-seated all FI related connections. The injectors are in unknown condition - came with the car.

This is different than the bucking I used to experience. I intermittently have a cylinder drop off. It happens at all speeds, but is really noticeable at idle. I had it running for a while in my driveway tonight and the exhaust fumes spelled especially "gassy."

When it's not missing, it runs fantastic and idles perfectly.

I think I have a fuel injector going bad. Can they fail intermittently? Anyone else experience something like this?

I figured I would just pull all four injectors, run the fuel pump and measure the fuel...but I'm not sure I could find the faulty one if it functions correctly during the test.

Pretty boring video (IMG:style_emoticons/default/dry.gif) Engine starts running rough intermittently at :40 (engine bay sound) and 2:07 exhaust.

https://www.youtube.com/watch?v=xQoMS-NeOag...eature=youtu.be

Any advice is appreciated.

[Ian Stott]

When you tested your fuel pressure and you said it was spot on, does that mean the needle in the gauge stayed pretty steady? When I checked mine last week, it was high, so we set it at 31 as other 2056 guys said that was where they set theirs, but the needle jumped around a bit, kinda bouncing between 33 and 29, not steady at all, so if that's not the normal behaviour what do you think is happening with mine, trigger points maybe??

Ian Stott
Moncton
Canada

[BeatNavy]

When you tested your fuel pressure and you said it was spot on, does that mean the needle in the gauge stayed pretty steady? When I checked mine last week, it was high, so we set it at 31 as other 2056 guys said that was where they set theirs, but the needle jumped around a bit, kinda bouncing between 33 and 29, not steady at all, so if that's not the normal behaviour what do you think is happening with mine, trigger points maybe??

Ian Stott
Moncton
Canada

I just checked my fuel pressure today and adjusted it back toward 29 psi. That's kind of my experience - it bounces around a fair amount (anywhere from 1 to 3 psi of variance). Not sure if it's a cheap gauge, but I just kind of try to find the 'average' of the bouncing around.

[saigon71]

When you tested your fuel pressure and you said it was spot on, does that mean the needle in the gauge stayed pretty steady? When I checked mine last week, it was high, so we set it at 31 as other 2056 guys said that was where they set theirs, but the needle jumped around a bit, kinda bouncing between 33 and 29, not steady at all, so if that's not the normal behaviour what do you think is happening with mine, trigger points maybe??

Ian Stott
Moncton
Canada

I just checked my fuel pressure today and adjusted it back toward 29 psi. That's kind of my experience - it bounces around a fair amount (anywhere from 1 to 3 psi of variance). Not sure if it's a cheap gauge, but I just kind of try to find the 'average' of the bouncing around.

I think the bouncing is normal. I got it real close to 30 with the car running. Immediately after shutting it off, I checked pressure and it showed 30PSI with no bouncing.