Some mis-firing input please.... - Page 3

Italian LX · 07-13-2005, 07:40 AM

I think you should do a cylinder leak-down test.

93Cobra#2771 · 07-13-2005, 09:21 AM

Other places for vacuum leaks to occur other than just the vacuum tree - loose intake ducting, PCV malfunctioning, etc.

Also, have you checked your TPS to make sure it isn't going bad? Should have a linear voltage reading throughout it's movement. Sometimes "flat spots" will show up and cause havok with things.

If the O2's are going bad/not switching correctly, you will have EEC error codes. Have you tried pulling codes yet?

coupe · 07-13-2005, 02:05 PM

New TPS. Just gonna put an LS1 in it

It's going to be something simple like a loose
connection or something somewhere.

93Cobra#2771 · 07-14-2005, 06:32 AM

I can't remember if you said or not - did you try pulling codes?

coupe · 07-14-2005, 11:29 AM

no. I have the cheapo scanner box. Will see what it gives me. Keep in mind: the car idles great, runs great (at more than about 1/8-1/4 throttle and past 2400RPM).

WHat could be causing the 2400 RPM thing? Some pickup in the dist. right? Already changed it. Guess the CPU...

07-13-2005, 07:40 AM	#21
Italian LX Daddy x4 ...we're done Join Date: Dec 2004 Location: Oxford, AL Posts: 11,551	Re: Some mis-firing input please.... I think you should do a cylinder leak-down test. __________________ -Brian '86 Mustang GT Convertible '88 Mustang LX coupe '11 Odyssey TE '21 Insight Touring

07-13-2005, 09:21 AM	#22
93Cobra#2771 The Kocky One Join Date: Dec 2004 Location: Yeah, but those cutters won't bust any walnuts.â„¢ Posts: 1,948	Re: Some mis-firing input please.... Other places for vacuum leaks to occur other than just the vacuum tree - loose intake ducting, PCV malfunctioning, etc. Also, have you checked your TPS to make sure it isn't going bad? Should have a linear voltage reading throughout it's movement. Sometimes "flat spots" will show up and cause havok with things. If the O2's are going bad/not switching correctly, you will have EEC error codes. Have you tried pulling codes yet? __________________ *For Sale: Reproduction Window Stickers, 87+ Mustangs, Cobras, Lightnings, and HD F150!* Richard White 93 Cobra Kocky will be back!

07-13-2005, 02:05 PM	#23
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	Re: Some mis-firing input please.... New TPS. Just gonna put an LS1 in it It's going to be something simple like a loose connection or something somewhere. __________________ " If you can't explain it simply, you don't understand it well enough. " - Albert Einstein

07-14-2005, 06:32 AM	#24
93Cobra#2771 The Kocky One Join Date: Dec 2004 Location: Yeah, but those cutters won't bust any walnuts.â„¢ Posts: 1,948	Re: Some mis-firing input please.... I can't remember if you said or not - did you try pulling codes? __________________ *For Sale: Reproduction Window Stickers, 87+ Mustangs, Cobras, Lightnings, and HD F150!* Richard White 93 Cobra Kocky will be back!

07-14-2005, 11:29 AM	#25
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	Re: Some mis-firing input please.... no. I have the cheapo scanner box. Will see what it gives me. Keep in mind: the car idles great, runs great (at more than about 1/8-1/4 throttle and past 2400RPM). WHat could be causing the 2400 RPM thing? Some pickup in the dist. right? Already changed it. Guess the CPU... __________________ " If you can't explain it simply, you don't understand it well enough. " - Albert Einstein