X-Type ( X400 ) 2001 - 2009
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02 X-Type misfires

 
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Old 07-08-2019, 10:59 PM
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Default 02 X-Type misfires

since ive got her running good ive developed a few misfires

p0301 is how it started so i replaced the upped and lower intake gaskets and the imt gaskets. i also moved all the coils from the rear bank to the front. now im getting p0301 and p0304 lol the brake booster line and the pvc hose from the air cleaner to the intake are good.any ideas on what else i could seal up. ive actually sold the car and need to fix these before the guy picks it up lol i can get fuel trims tomorrow. the car starts to miss at like 5k rpm then goes into limp mode! thanks guys!
 

Last edited by GGG; 07-09-2019 at 08:04 AM.
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Old 07-09-2019, 05:11 AM
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Adam, because the misfire moved, I would question the coil that is on cylinder #4 right now. I would then access the plug for cylinder #1 and clean that. Because it was misfiring before, the plug may simply be fouled and that is what is causing the misfire. See what you have at that point and then go from there.
 
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Old 07-09-2019, 06:55 AM
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Originally Posted by Thermo View Post
Adam, because the misfire moved, I would question the coil that is on cylinder #4 right now. I would then access the plug for cylinder #1 and clean that. Because it was misfiring before, the plug may simply be fouled and that is what is causing the misfire. See what you have at that point and then go from there.
It's weird because I moved the packs straight across 1 to 2 and 3 to 4 etc I was expecting a p0301 I actually just checked the plugs in the back bank all where good and also no oil in the plug wells or on the plugs. I'm going to get a few coils and try that. Also is that vac hose on the back of the intake known to cause issues, mine seems kind of loose.

Thanks again
 
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Old 07-09-2019, 09:54 AM
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I would think if you would have a problem with the brake booster leaking you would be getting a lean code, Like P0171 or P0174 that would indicate a vacuum leak.
 
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Old 07-09-2019, 11:26 PM
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Replaced the 3 coils on the easy side today still getting a p0301 lol going to swap some around again such a pain in the butt to take the intake off. Hopefully this will cure the issue it's weird it on happens on hard acceleration like 5-6k. I also replaced maf and the sensor on top of the intake and the vacuum hose from the fuel rail to the back of the intake. Seems somewhat smoother now I guess the old coils are just shitting the bed.
 
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Old 07-14-2019, 02:48 PM
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Well thought I had it fixed. I cleaned and swapped injectors, I got a new coil I checked the wires coming off the coils and put a new spark plug in. It fixed the misfire for 1 day lol. Now p0301 is back. Throwing the car into limp mode when you hit about 5k rpm. I found a small vacuum leak on the plastic line going from the top of the tb to under neath the o2 sensor connectors.

Anyone have any ideas?

Thanks again guys.
 
 
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