Fuel Injector Going Bad?, FIXED - Thanks 914 World! |
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Fuel Injector Going Bad?, FIXED - Thanks 914 World! |
saigon71 |
Jun 10 2015, 07:32 PM
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#1
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Advanced Member Group: Members Posts: 2,000 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region |
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. |
saigon71 |
Jun 15 2015, 06:15 AM
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#2
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Advanced Member Group: Members Posts: 2,000 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region |
Thanks for the responses. The trigger points were inspected and cleaned earlier this year when I pulled the dizzy to clean and lube. The fuel filter was the first thing I suspected, so I replaced it a few weeks ago. FI grounds look good. Climbed under the car yesterday to verify there were no fuel line kinks under the tank.
As suggested, I started the car and pulled the FI connections one cylinder at a time. Found the problem to be with the #3 injector. I'm pulling all four injectors and shipping them out to Mr. Injector for cleaning and flow test. I know the car has been run with sediment in the tank. If this doesn't fix it, I'll move on to the harness. (IMG:style_emoticons/default/dry.gif) Thanks for the info on Mr. Injector Mark. Seems like a great value. |
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