Hesitations everywhere in the power band

AliasJerk · 06-26-2008, 01:17 PM

I have been battling this problem ever since I got the car... I picked up an SVT contour back in February and I have been trying to figure out this hesitations problem I have been having.

Since I have been dealing with CEL since I got the car, and finally worked out the problems, the CEL is off and I am still having this problem.. Anyways, onto the description...

When it gets hotter outside, and when the motor is up to normal operating temperature, I get very noticeable hesitations in the low end and the top end, its the most noticeable when the secondaries open, I feel the surge of power then almost immediately afterwards the power drops off (but the engine note doesn't change).

Same thing happens down low around 2100-2500 RPM, but its a lot more subtle. I noticed it also gets worse the harder I drive. I also noticed a couple of times when I bring the car up to reline, I hit fuel cutoff at about 6500 RPMs, Which I thought it was 6800 on the SVT.

I did some investigating, found that the car has new spark plugs (auto lite Double Plats) and brand new Spark plug wires.

I also want to point out that about a month ago I pulled P0230, which is the Fuel pump primary circuit failure, which I found strange because I can run the car till the gas light comes on, and it still runs and drives just the same... I deleted the code and it never came back...

I know this is a cougar forum guys, but I want some good input over here.

B3NN3TT · 06-26-2008, 01:20 PM

I'm sure it could use a new fuel filter; probably not the cause of the problem, but who knows?

skater · 06-26-2008, 02:51 PM

Is the A/C off when this happens? That's probably not what it is, but make sure you're still having the problem when the A/C (and defroster) is off.

AliasJerk · 06-26-2008, 02:54 PM

A/C doesnt work in the car, well it does but it needs to be recharged for it to actually work properly.

Because it doesnt work I dont use it, but I had thought of that. I am wondering if its my fuel pump creating the issue, or even just a combination of the filter and the filter sock on the fuel pump.

skater · 06-26-2008, 03:03 PM

Another thought that crosses my mind is the coil pack. Unfortunately there's no real way to tell without replacing it.

AliasJerk · 06-26-2008, 03:08 PM

Quote:

Originally Posted by skater

Another thought that crosses my mind is the coil pack. Unfortunately there's no real way to tell without replacing it.

I've got a spare one available to me.

brapple · 06-26-2008, 03:17 PM

check the plug gap? check for carbon tracking? check the status of the fuel pump or the fuel pressure? how is the vacuum line to the FPR?

AliasJerk · 06-26-2008, 03:40 PM

Quote:

Originally Posted by brapple

check the plug gap? check for carbon tracking? check the status of the fuel pump or the fuel pressure? how is the vacuum line to the FPR?

How do I check for carbon tracking? I have never had to do it before.

Edit: I just checked the FPV Vac line, its connected and has no breaks in it. So im back to checking my plug gap, carbon tracking, and a fuel filter/possible bad fuel pump.

B3NN3TT · 06-26-2008, 04:54 PM

Pull a spark plug or two. If you see or feel little carbon "tracks" on the porcelain, you have an ignition problem, and need new plugs and wires immediately.

ironworker · 06-26-2008, 08:06 PM

If You Always Run Your Car With The Tank Almost Empty, Theres A Good Chance The Fuel Filter And Sock Are Clogged..

06-26-2008, 01:17 PM	#1 (permalink)
AliasJerk midget tosser in training Join Date: Jan 2008 Location: Some say that he is an SVT project that was actually done properly, Mitchagain Posts: 86	Hesitations everywhere in the power band I have been battling this problem ever since I got the car... I picked up an SVT contour back in February and I have been trying to figure out this hesitations problem I have been having. Since I have been dealing with CEL since I got the car, and finally worked out the problems, the CEL is off and I am still having this problem.. Anyways, onto the description... When it gets hotter outside, and when the motor is up to normal operating temperature, I get very noticeable hesitations in the low end and the top end, its the most noticeable when the secondaries open, I feel the surge of power then almost immediately afterwards the power drops off (but the engine note doesn't change). Same thing happens down low around 2100-2500 RPM, but its a lot more subtle. I noticed it also gets worse the harder I drive. I also noticed a couple of times when I bring the car up to reline, I hit fuel cutoff at about 6500 RPMs, Which I thought it was 6800 on the SVT. I did some investigating, found that the car has new spark plugs (auto lite Double Plats) and brand new Spark plug wires. I also want to point out that about a month ago I pulled P0230, which is the Fuel pump primary circuit failure, which I found strange because I can run the car till the gas light comes on, and it still runs and drives just the same... I deleted the code and it never came back... I know this is a cougar forum guys, but I want some good input over here. __________________ 98.5 T-red on MNB SVT Contour - Jerk Mobile III Wanna trade my SVT for your cougar? PM me Last edited by AliasJerk; 06-26-2008 at 02:47 PM.

06-26-2008, 02:51 PM	#3 (permalink)
skater Capital Curmudgeon Join Date: Aug 2003 Location: Bowie, MD Posts: 6,475 Images: 3 Blog Entries: 1	Re: Hesitations everywhere in the power band Is the A/C off when this happens? That's probably not what it is, but make sure you're still having the problem when the A/C (and defroster) is off. __________________ 1999 Cougar, Laser Red, 2.5L V6, MTX / 2004 Impala, Superior Blue, 3.4L V6, ATX / 1991 Airstream B190 7.5L V8

06-26-2008, 02:54 PM	#4 (permalink)
AliasJerk midget tosser in training Join Date: Jan 2008 Location: Some say that he is an SVT project that was actually done properly, Mitchagain Posts: 86	Re: Hesitations everywhere in the power band A/C doesnt work in the car, well it does but it needs to be recharged for it to actually work properly. Because it doesnt work I dont use it, but I had thought of that. I am wondering if its my fuel pump creating the issue, or even just a combination of the filter and the filter sock on the fuel pump. __________________ 98.5 T-red on MNB SVT Contour - Jerk Mobile III Wanna trade my SVT for your cougar? PM me

06-26-2008, 03:03 PM	#5 (permalink)
skater Capital Curmudgeon Join Date: Aug 2003 Location: Bowie, MD Posts: 6,475 Images: 3 Blog Entries: 1	Re: Hesitations everywhere in the power band Another thought that crosses my mind is the coil pack. Unfortunately there's no real way to tell without replacing it. __________________ 1999 Cougar, Laser Red, 2.5L V6, MTX / 2004 Impala, Superior Blue, 3.4L V6, ATX / 1991 Airstream B190 7.5L V8

06-26-2008, 03:17 PM	#7 (permalink)
brapple NECO Member Join Date: Oct 2004 Location: Enfield, CT Posts: 1,206	Re: Hesitations everywhere in the power band check the plug gap? check for carbon tracking? check the status of the fuel pump or the fuel pressure? how is the vacuum line to the FPR? __________________ - 95 Mystique LS Zetec 5-spd - 99 Contour SeVT Duratec 5-spd (3L and NPG Turbo Kit) - 2k Contour SVT - #2137

06-26-2008, 08:06 PM	#10 (permalink)
ironworker NECO Member Join Date: Apr 2008 Location: BEAR DELAWARE Posts: 109	Re: Hesitations everywhere in the power band If You Always Run Your Car With The Tank Almost Empty, Theres A Good Chance The Fuel Filter And Sock Are Clogged..

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