Yes! I have been having the same problem. When im driving at a normal speed around 40 mph and the rpms are around 2000 it sort of surges back and forth really slightly and the rpms move up a little and down a little. It drives me crazy, I really didn't notice this problem until I took it to Ford Dealership for a oil chane 2 weeks ago and they told me I need to have a colant flush and my fuel filter replaced. They said my fuel filter is 70% bad, I am going to replace it as soon as I get my money.

 

Moved to Ford Focus Technical Chat

 

EGR?

 

There was something about this before. Some service note... I forget exactly what was causing the problem, but when you'd reach around 2000 rpm and are cruising at that speed, you'll notice some "surging" or "jerking"... it's not hard jerking, but there's something there causing a weird feeling from the car... if it happens to you, then you know what I'm talking about. Ha ha. You're not alone on this one, man. It's nothing too bad to worry about, but still annoying none-the-less. I never had mine checked out or fixed for this, as it's not too often I cruise at 2000 rpm. []

 

If it's not the Fuel Pump, have you checked to see if you DPFE needs replacing? I heard that the 2000-2001 had problem's with this. I never had to have mine replaced. Guess I got lucky.

 

I know when I had this problem with my Buick regal,
it was the plug wires. It was fine floored or at low
or high speeds, it surged just like that in between.

 

Yes! I have been having the same problem. When im driving at a normal speed around 40 mph and the rpms are around 2000 it sort of surges back and forth really slightly and the rpms move up a little and down a little. It drives me crazy, I really didn't notice this problem until I took it to Ford Dealership for a oil chane 2 weeks ago and they told me I need to have a colant flush and my fuel filter replaced. They said my fuel filter is 70% bad, I am going to replace it as soon as I get my money.

thats so weird, i just had that happen to me today. thank god someone else has already checked it out.

 

surging etc...

well your not alone.. my new SVTF less than 3000 miles does the same thing.. annoying. i am going to be getting the SCT tune soon so i hope this will put an end to this problem, also doing some plug wires and exhaust soon. let us know if you figure out the problem.[cool]

 

Get a tune and it will go away.

 

the SVT surging is completely different than other foci surging...

ours is purposefully caused by the ECU as part of the warm up process...

 

my car used to surge on me while crusing. its now in the shop. it eventually got so bad that i cannot drive it. i should get it back in a day or two. ill let you know what happens.

 

surging etc...

revamp, my 04 SVTF does this even after warm up. i bought this car for gas milage, so i drive it mostly easy.. anytime around 2200RPM in 4th gear you can feel it, only if at a steady speed and about 40mph.[???]

 

my focus did the same thing with my AEM cai I hooked my scanner to it and found that the stock mass air flow sensor was way out of range. This caused the ECU to think it was getting to much air so it dumped alot of fuel and retarded the timing. Causing a small surging. I thought the same thing and tuned the engine which did not help.

 

well the ford racing wires are a few months old, i have a fuel filter on the shelf waiting to go on as soon as it gets nicer outside.
maybe i can clean the throttle body and check the maf anyhow. can i spray something on the maf to clean it. i haven't looked at it but if it is like my gm one maybe there is something i can do to clean it

what is a DPFE ??????

texassvt,
mine is pretty much the smae as yours, and the gas mileage is not that great either! lol!!!

jflash,

look forward to your feedback!


how in the heck does a dealer know it is 70% bad! wtf??? do they flow fuel through it to verify a flow rate???

thanks to all for their input! i will post after filter is changed, i hope to be able to figure it out soon enuff!

 

I just bought an 01 zx3 and my car surges too, but my check engine light is on also. I have no clue whats going on

 

had this problem with my 01. Its real easy to fix. It is probably the Differential Pressure Feedback EGR (DPFE) sensor. My engine light came on too and when I ran the code it indicated the EGR system. That could have been a couple of things, but after talking to the guys at the parts dept they told me that they had been selling a helluva lot of those. I believe it was around $30 and took about 10 minutes to change. Fixes don't come much more cheaper or quicker. Check to see if your ride qualifies for the service bulletin that Ford issued for this part. If so it will be done for free. I think your car has to be less than 5 years old with less than 50k to qualify. Good luck

 

wow thanks, i will change that as well. is it on the top of the motor, somewhere near the intake? is it a diaphragm style, i will look latoer on to see if i can find it

i just changed the fuel filter a day ago along with an oil change and i cut that bump out to allow more air in to the stock air intake. haven't driven the car but i will report back after putting a few miles on it.

 

Experienced the same problem with my 2002 ZTS at 78,000 miles. Engine surging at 40 mph. After several months of driving with this condition the 'check engine' warning light came on. Two codes P1401 - DPFE and P0401 - EGR flow.

Replaced DPFE (OEM# 2F1E-9J460-AB) for $30 (non OEM part). Problem solved.

 

Experienced the same problem with my 2002 ZTS at 78,000 miles. Engine surging at 40 mph. After several months of driving with this condition the 'check engine' warning light came on. Two codes P1401 - DPFE and P0401 - EGR flow.

Replaced DPFE (OEM# 2F1E-9J460-AB) for $30 (non OEM part). Problem solved.