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Hard-Starting Issue


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I changed my spark plugs 15 days ago (put in TRD IK22) and I replaced my fuel filter 9 days ago on my 2001 Runx. Over the past week, I have been having some issues where I experience “hard starting” mainly when the car is cold and generally, it takes a little longer to start. I put back in the old spark plugs (TRD IK20X) last night and this morning it still "hard started", in fact, everytime I touched the accelerator, it bogged down. However, it cleared up after about 2 minutes of driving at 10 km/h after which it did not re-occur.

However, it will still "hard start" if the car is left for a period of time. I plan to check the fuel pressure this evening. Does anyone else have any other suggestions?

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I cheked the fuel pressure and I got 21 psi so I decided to take back out the fuel filter assembly and I found that the o-ring in the top of the suction cover was not seated correctly. I re-seated the o-ring correctly this time and put everything back together and checked the fuel pressure again and this time it was reading 48 psi.

The car starts fine now with no problems.

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