turbo set up wont rev past 5k

[boostin35psi]

i just got my set-up all done, i installed a fmu and missing link on my motor for right know. well i was test driving it and it takes awhile for it to get from 4500k-5k then it hesitates and it doesnt want to go past that and it back fires just alittle. from 1k to 4k it drives normal. i was wondering if it had something to do with the gap on the spark plug? right know i have them set at .44, and i retarted the distributor all the way. please help

[cypher]

check engine light? sounds like the map

[VashThaStampede]

whats your engine management system?

[boostin35psi]

check engine light? sounds like the map
yea the light is one but its always been on though. should i just switch it with another map sensor and see what happends?

[boostin35psi]

whats your engine management system?
just a missing link and a fmu

[SecretAgent]

that's your motor telling you that it's running like total shit, and if you push it anymore you will blow it up. get a good setup, then try to boost on it. not the other way around.

[boostin35psi]

i just put my distributor back to the stock location and replaced my map sensor. now i could go into vtec but it starts to backfire like a mofo. sould i advance the timming on the distributor some more? or should i regap my spark plugs? right know i have them set at .44 i dont know if your suppose to have a lower gap?

[240sxboi]

what car are you trying to do all this in? what all is done to the motor? what have you fucked up already? did you use colder plugs, etc?

[VashThaStampede]

.42 is oem gap for honda plugs,, go to .41 for low boost apps... also, a missing link and fmu ARE NOT engine management, you need something like Hondata, a hacked sfc/vafc, or at the very leats one of those ghetto uderdata chips.. i dont know what you're car is..but if its honda..then stock ecu will cut off at 5-7 psi or 5500 rpms.. depending on injector duty.

also ,the wrong fmu could caus eyou to run a little rich..which would also cause bogging.

and a missing link only bleeds off excess pressure to protect map sensor..did you make sure to put the screen into that when you installed it,,

[boostin35psi]

.42 is oem gap for honda plugs,, go to .41 for low boost apps... also, a missing link and fmu ARE NOT engine management, you need something like Hondata, a hacked sfc/vafc, or at the very leats one of those ghetto uderdata chips.. i dont know what you're car is..but if its honda..then stock ecu will cut off at 5-7 psi or 5500 rpms.. depending on injector duty.

also ,the wrong fmu could caus eyou to run a little rich..which would also cause bogging.

and a missing link only bleeds off excess pressure to protect map sensor..did you make sure to put the screen into that when you installed it,,

my car is a 97 gsr, i'm just boosting it to 5 psi. and when i installed the missing link i put the little screen in.

[cypher]

what are your cels?

[boostin35psi]

what are your cels?
what is a cel?

[cypher]

check engine light

[boostin35psi]

check engine light
i found the problem, my gap on the spark plug was to big. i regaped them to .30 and it runs perfect. thanks for your help :thumb: