TurDz

iTrader: (3)

Occasionally, I have surging acceleration w/ a smooth gas pedal press. I'm not totally sure why that happens, but when it does, the ECU gives out the numbers, 0304 and 0201 (Knock Sensor and Ignition Signal Circuit).

I haven't tried to solve this problem yet, and I just reset the ECU, being watchful if the numbers pop up again.

Now, I've also noticed relation to this problem. When I try to fully floor the gas pedal from a full stop, in the past I've also noticed the same type of hesitiation (and surging) as above, and the same code numbers are sent.

I was wondering about any solutions to this. I just received my Haynes manual today, and I was looking through it, but I'm not expereinced enough to determine the correct area of dianostic/repair.

Thanks for any help.

Toolrocks

iTrader: (1)

Hey I'm sorry I can't offer any input but I am experiencing the same problem. It is a surge that goes un-noticed by most people but I 'feel it' when they say they don't. It occurs around 3000 rmp - 4000 rmp and feels kinda like there is a 'lobe' to my engine. It doesn't really feel like a miss though. I can mash the gas and plow right through it without seeming to lose any power. I only feel it on a slow, gradual acceleration (smooth gas pedal). This hasn't been a problem but it does have me concerned. Also, I have recently replaced the knock sensor and one of the rear O2 sensors and I still experience the problem. I only mention the knock sensor because of your trouble codes. Hope somebody has some input.

Sonic

Join the club. I just recently started to experience this. At first it appeared in the 1200-2000 range, and was a very slight surging, unnoticeable to anyone else. After finding a slight intake leak and fixing it, it now has apparently moved to exactly 2400 RPM and only there. I also get a ECU code, but it is only the 0304, the Knock Sensor part. Having tested the sensor and finding it within spec, I have tried resetting the ECU various times, and it continues to happen. There is now no noticeable loss of power, so I am willing to put up with it for the next few weeks, until I decide to change the sensor. You may want to talk to Ant95SE, he has had a similar experience that disappeared when he replaced the KS.

Daniel B. Martin

Read the Sticky ECU Diagnostic Trouble Codes. It has some information about DTC 0201. This Code may be set by a problem with the Crankshaft Position Sensor (REF). Your newly-acquired Haynes repair manual contains instructions for a simple resistance test of this sensor on page 6-12. Examine the harness and connector for this sensor for signs of damage or dirty contacts.