SCs197gt

I know this could be posted in a few different places in this forum but I was hoping you guys can help since you drive this type of vehicle. I've had the saleen sc on my s197 gt for a couple of years now and it just started giving me this problem. When I go WOT it hesitate's quite a bit and sounds like its backfiring out the exhaust. Like a buble buble buble noise. It feels like there is blips in the throttle like its trying to get up and go but just cant. After it goes through this once or twice it seems to pull fine. It's like it need's to "clear its throat" before it performs if that makes sense lol

Ive thought this could be a fuel issue, maybe fuel filter or a problem with the dual fuel pumps or intake issue but not too sure.

Any help would be great, thanks!!

ctann

When did you last check/change your plugs?

Chris.

siggyfreud

Might also be a good time to do the fuel filter and clean the throttle body.

Jonsey

Perhaps an oil seperator might help.

DisneyRacing

I have a 2006 Saleen Extreme number 91 and not at the low end of the gear range but at the top end of the gears (most noticeably in 3rd and 4th) while accelerating Wide Open Throttle, it hesitates and misses, but only about HALF of the time... other times is seems fine. So reading the posts, suggest plugs? How long should plugs last? I have 8,000 miles on them, and 10,000 on the car (they were originally replaced due to the car running too rich). Okay, so if I have to replace the plugs, do you know if they are just standard Ford Motorcraft or not? Thanks.
--Kinann
800 657 2210

ctann

Big difference between a low RPM miss and a high RPM miss. I'd be really careful, missing at high RPM can indicate things like low fuel, which can lead to lean conditions and detonation. When you say you are WOT in third, did you mean you ran up to redline in second and then shifted - or is this cruising in third/forth, and then flooring it?

Chris.

SCs197gt

Thanks for all your input. Changed out the plugs yesterday and it seemed to clear up most of the symptoms. To answer your question about what kind of plugs, ford uses autolite HT1's but in your extreme saleen used HT0's and that's what I went with.

ctann

Take a good look at your old plugs too - you can tell a lot about the condition of the engine and the state of the tune by "reading" the plugs...

Chris.

SCs197gt

Thank you

i did see this article before attempting to change them out. From an amature set of eyes everything looked pretty normal on the old plugs, dry, normal burn, and no metal filament.

SCs197gt

Soo it came back but not as bad, gonna pull the plugs today and double check the gap. Now if it is a bad coil, how do I check indidvidual coils to test if they're bad or do I have to replace them all?? And if it was a coil wouldn't the check engine light come on??

Thanks