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Old 08-16-2013, 11:47 PM   #1
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Stumble on acceleration

When driving my stock-ish (BBK CAI is the only mod) 2001 Bullitt at a constant RPM, if I stab the throttle there is a pause before acceleration. I thought the clutch might be slipping but the RPMs don't increase before I accelerate. I checked the throttle cable and there is no play or sticking while manipulating the throttle body. There are no CELs but I haven't been able to scan it for codes, yet, either. Any ideas on what I may be looking at?
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Old 08-17-2013, 12:19 AM   #2
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When driving my stock-ish (BBK CAI is the only mod) 2001 Bullitt at a constant RPM, if I stab the throttle there is a pause before acceleration. I thought the clutch might be slipping but the RPMs don't increase before I accelerate. I checked the throttle cable and there is no play or sticking while manipulating the throttle body. There are no CELs but I haven't been able to scan it for codes, yet, either. Any ideas on what I may be looking at?
Tune that beast! That may fix the problem, but I don't know. Someone else will know.
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Old 08-17-2013, 01:08 PM   #3
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Get it scanned.
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Old 08-17-2013, 01:19 PM   #4
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Originally Posted by Finally4190 View Post
When driving my stock-ish (BBK CAI is the only mod) 2001 Bullitt at a constant RPM, if I stab the throttle there is a pause before acceleration. I thought the clutch might be slipping but the RPMs don't increase before I accelerate. I checked the throttle cable and there is no play or sticking while manipulating the throttle body. There are no CELs but I haven't been able to scan it for codes, yet, either. Any ideas on what I may be looking at?
How many miles on it?
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Old 08-18-2013, 09:35 AM   #5
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100,000 miles.
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Old 08-18-2013, 03:19 PM   #6
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New plugs, clean throttle body and MAF, air and fuel filters. It may be getting close to a new set of coils also.
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Old 08-18-2013, 06:18 PM   #7
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I'm worried about changing the plugs, with all the horror stories I've heard about stripping cylinder head threads. And is carb cleaner OK to use for the MAF and throttle body? And I've had 1 coil pack go and replaced it by itself. Are the ACCEL coil packs worth anything over factory or is OEM best?
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Old 08-18-2013, 06:44 PM   #8
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DONT USE CARB CLEANER. There are special products for both the MAF and the TB. Order the TB gasket ahead of time. The auto parts store probably won't have it. Motorcraft only on the coils. And, yeah, the spark plugs... they aren't going to change themselves. Lol. It was my first time on a mod also. Just take all of the precautionary measures and hope for the best. I had one plug that felt kind of iffy but everything worked out alright. You can do it. Again, only Motorcraft for the plugs and Rockauto seems to be the cheapest on the coils. There is a Rockauto discount code in the General Mustang forum.
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Old 08-18-2013, 06:46 PM   #9
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Thanks for the help. Should I use PB blaster on the plugs the day before?
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Old 08-18-2013, 06:47 PM   #10
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Couldn't hurt
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Old 08-18-2013, 07:04 PM   #11
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Thanks again. I'll let you know how it goes. I'll be placing an order to Rock Auto by the end of the week after I get her scanned.
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