kickin and spittin

mudchucker · 03-30-2007, 02:07 PM

Hey guys, i was battling with this last year and now i am back at it this spring. I put in 24# injectors over the winter and it didn't change anything. When i hit about 3500rpm at WOT it starts kicking abd bucking and sometimes backfires. I can run it up nice and easy over 3500rpm, but not while i am hard on the throttle. I have a comp cam, cobra intake, 65mm throttle body, 24# injectors, and windsor jr. heads. any thoughts on what might be causing this issue? Also, i am running it at full advance, and i have tried letting the em auto advacne, but that doesn't work good at all. any thoughts are greatly appreciated. thanks

goodyear1984 · 03-30-2007, 10:46 PM

just a quick question did you change out the maf when u changed to the 24# injectors

mudchucker · 03-31-2007, 05:48 AM

Quote:

Originally Posted by goodyear1984

just a quick question did you change out the maf when u changed to the 24# injectors

O, sorry i forgot to mention that part. I am still running Speed density. It is weird, it seems like it would have changed soe with the large injectors, but it is the same exact situation. I put in a new regulator when all this started and didn't help at all. The only thing i have not checked is the fuel pressure on the rail. My rail does not have a fitting to be able to check the pressure. Do you guys no if i can put some kind of in line pressure fitting somehow?

USMC302 · 04-06-2007, 07:21 AM

What year car do you have?

mudchucker · 04-08-2007, 03:40 PM

Quote:

Originally Posted by USMC302

What year car do you have?

it is a 90 lincoln motor, but i have switched everything over to mustang internals and externals.

USMC302 · 04-09-2007, 03:10 PM

Quote:

Originally Posted by mudchucker

it is a 90 lincoln motor, but i have switched everything over to mustang internals and externals.

Then you should have a schrieder valve on the fuel rail, all 87-95 stangs came with one on them. I wanna say I've seen a regulator that had a pressure guage off of it, but not sure. that would be the only other way, unless you get aftermarket fuel lines.

What do you mean when you say your running it at "full advance"?

What is the timing set at right now? Are you pulling any codes?

mudchucker · 04-09-2007, 06:24 PM

Quote:

Originally Posted by USMC302

Then you should have a schrieder valve on the fuel rail, all 87-95 stangs came with one on them. I wanna say I've seen a regulator that had a pressure guage off of it, but not sure. that would be the only other way, unless you get aftermarket fuel lines.

What do you mean when you say your running it at "full advance"?

What is the timing set at right now? Are you pulling any codes?

The timing is at 32 with the plug pulled. The plug is that ecm module that disables the computer from adjusting the timing, i can't remember the name of the plug right off hand. Not reading any codes. As far as the rail, i don't have the valve on mine for some reason. I checked the other rails i have and they both have it, but this one does not. Of course, this is the only rail where the fuel lines come out on the correct side, or i could just switch them out and do it that way. would a lack of fuel pressure at the rail cause it to kick and sputter, then somtimes even backfire when i am getting on it hard, or would it just run weak?
any ideas on what to cehck would be greatly appreciated

USMC302 · 04-09-2007, 07:31 PM

Only one rail is supposed to have the valve, steal the other one for a swap.

Dog5ohfun · 04-10-2007, 12:24 AM

I was just reading your thread. Your timing should be 10- 14 degrees with the plug pulled. 32 is full computer advance with the plug in. Put your timing down to 10 to start and see if that solves your problem. Hope this helps.

mudchucker · 04-10-2007, 05:45 AM

Quote:

Originally Posted by Dog5ohfun

I was just reading your thread. Your timing should be 10- 14 degrees with the plug pulled. 32 is full computer advance with the plug in. Put your timing down to 10 to start and see if that solves your problem. Hope this helps.

whoa!!! i am way advanced. i will kick it down and see what happens.

USMC302 · 04-10-2007, 08:33 AM

Unless you leave the plug out, which is what I thought you were saying you do, "run it full advance with plug out". If you plug the spout connector back in then yes that's a little much for timing.

03-30-2007, 02:07 PM	#1
mudchucker Registered Member Join Date: Mar 2004 Posts: 73	kickin and spittin Hey guys, i was battling with this last year and now i am back at it this spring. I put in 24# injectors over the winter and it didn't change anything. When i hit about 3500rpm at WOT it starts kicking abd bucking and sometimes backfires. I can run it up nice and easy over 3500rpm, but not while i am hard on the throttle. I have a comp cam, cobra intake, 65mm throttle body, 24# injectors, and windsor jr. heads. any thoughts on what might be causing this issue? Also, i am running it at full advance, and i have tried letting the em auto advacne, but that doesn't work good at all. any thoughts are greatly appreciated. thanks

03-30-2007, 10:46 PM	#2
goodyear1984 Registered Member Join Date: Dec 2006 Location: new york Posts: 482	Re: kickin and spittin just a quick question did you change out the maf when u changed to the 24# injectors __________________ 347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters ^best et so far 11.6 1.61 60ft coming soon 9sec et's 1992 mustang gt 2001 gmc 1500 4x4 78 century boat 92 skidoo

04-06-2007, 07:21 AM	#4
USMC302 Registered Member Join Date: Apr 2001 Location: Gallatin, Tn Posts: 1,326	Re: kickin and spittin What year car do you have? __________________

04-09-2007, 07:31 PM	#8
USMC302 Registered Member Join Date: Apr 2001 Location: Gallatin, Tn Posts: 1,326	Re: kickin and spittin Only one rail is supposed to have the valve, steal the other one for a swap. __________________

04-10-2007, 12:24 AM	#9
Dog5ohfun Registered Member Join Date: Feb 2002 Location: Arlington, Washington Posts: 92	Re: kickin and spittin I was just reading your thread. Your timing should be 10- 14 degrees with the plug pulled. 32 is full computer advance with the plug in. Put your timing down to 10 to start and see if that solves your problem. Hope this helps. __________________ Black 1990 LX DSS Racing Super Pro Bullit 331, AFR 185, Anderson B31 Cam, 1.6 DSS rockers, Cobra Intake w/ 2 phenolic spacer, Aluminum DS, 3.73 gears, Tremec 3550, Lakewood SFI Bellhousing, MSD Digital 6+, Spintech Side Exhaust,

04-10-2007, 08:33 AM	#11
USMC302 Registered Member Join Date: Apr 2001 Location: Gallatin, Tn Posts: 1,326	Re: kickin and spittin Unless you leave the plug out, which is what I thought you were saying you do, "run it full advance with plug out". If you plug the spout connector back in then yes that's a little much for timing. __________________

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