Smoking and hard start after injector change - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 08-29-2010, 08:05 AM Thread Starter
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Smoking and hard start after injector change

Here is my problem. I have a 2002 7.3 F250 with 150K miles. I have a superchip tune on performance, K and N air intake, turbo back 4" exhaust, 35" tires, 4.56 gears and a 4" lift.

I had/have a "tap tap tap" noise in the engine that runs good. No miss, no smoke (except black when you punch it). One guys said bad piston, one guy says fuel/injector knock. I take it to Ford and have a buzz and contribution test done. They tell me #3 injector is bad ($239 for that info). I order a re-manufactured stock injector and replace the #3 injector along with the gasket and UVC harness and MAP Sensor. Swap out seemed to go very well. No problems.

Now it will not start via the auto start (did before perfectly) and needs to be turned over for 3 or 4 seconds before starting. Now it has a constant plume of gray smoke that comes out as I drive and the freaking tapping is just as bad.

So good advice here would be greatly appreciated. These motors are supposed to be bullet proof.....
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post #2 of 4 Old 09-13-2010, 01:43 AM
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Hi sounds like you may have damaged the engine when you swapped out the injectors. Perhaps too much engine oil fell in the combustion chambers?
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post #3 of 4 Old 03-23-2012, 05:39 PM Thread Starter
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I had to rebuild the motor. Best thing ever. Runs better than new


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2002 PSD Super Duty Crew Cab 4WD
1805 Superchips Flashpaq, K and N cold air intake, 5" exhaust, 35's on stock wheels and 4:56 gears. 155K miles with BIG air horns. HIgh output alternator to run the amps

1999 PSD Super Duty 2WD
1705 Superchip, 80k miles with utility bins on it for work.

2001 PSD Super Duty Crew Cab
1805 Superchip Flashpaq. 35" tires on stock rims

AutoEnginuity Scan Tool with Ford Bundle
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post #4 of 4 Old 03-23-2012, 05:42 PM
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What was the issue?



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
330,000 + miles
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