[89LX347]

i have a 347 stroker motor and i think it might be a fuel problem but when i am just driving normal and even when i get on it it cuts out and kind of hesitates..please give me suggestions i have a 110 LPh fuel pump in it right now is a walbro 255 calling my name?

[neverfastenough1]

Lets start with some easy stuff. I am all about the easy stuff. Do you have cats still or off road mid pipe? If you have cats do you have a smog pump? Again, if you do, check at night to make sure they are not getting red hot after driving around. Did you change your fuel filter when you put the motor and pump in? Did you change your air filter? All of these things are common problems that cause hesitation. Did it just start doing it or has it been doing it since you put the 110 in it?

[tording92lxnotch]

Originally Posted by 89LX347 i have a 347 stroker motor and i think it might be a fuel problem but when i am just driving normal and even when i get on it it cuts out and kind of hesitates..please give me suggestions i have a 110 LPh fuel pump in it right now is a walbro 255 calling my name?

110LPH?? I thought the stock one was like a 150 or 155 LPH? I thought the first upgrade fuel pump was a 190 LPH, and then the 255 LPH, and then the 255 Hi Press LPH pump? I have never heard of a 110 pump.

[89LX347]

Originally Posted by neverfastenough1 Lets start with some easy stuff. I am all about the easy stuff. Do you have cats still or off road mid pipe? If you have cats do you have a smog pump? Again, if you do, check at night to make sure they are not getting red hot after driving around. Did you change your fuel filter when you put the motor and pump in? Did you change your air filter? All of these things are common problems that cause hesitation. Did it just start doing it or has it been doing it since you put the 110 in it?

No i dont have cats anymore...yes an off road h pipe..no smog pump ..yes i changed my fuel filter recently and i have the BBK air filter ..they say its reusable ..and it just started doing it and it usually does it after i give my car a wash

[fogged306]

Did you check your spark plug wires?

[neverfastenough1]

Stock is like 80 lph. I believe it is 18 gph which is like 76 lph or close to it. Yes there is a 110lph. Anyways, since you blew all the easy stuff out of the water, we'll have to go to the water issue. You got me how the water would affect it that way. If it is only happening after you wash it, that it has anything to do with the size of you pump. Unless it is just a coincidence. Is that the only time it is doing it? We are back to square one. Your tps will cause hesitation. I don't know if it would cause a problem if it got wet or no. I'll back out and see if someone else can help you out. It is time (past time) for me to call it a day. Try to see if there are any codes that aren't tripping a engine light. Good luck.

[89LX347]

ya i just put new MSD spark plug wires and made sure they were firmly on the cap and the spark plugs....no when i wash it it does it more than regular ..and agian this just started happening ..i just put new blaster coil wires and cap and rotor on it ..thanks for your help i will try to fing out

[SALIV8]

Originally Posted by 89LX347 ya i just put new MSD spark plug wires and made sure they were firmly on the cap and the spark plugs....no when i wash it it does it more than regular ..and agian this just started happening ..i just put new blaster coil wires and cap and rotor on it ..thanks for your help i will try to fing out

sounds like an ingnition issue to me, if it gets worse when wet or humid. pop ur hood when its dark out and watch under neath when a buddy revs it see if u notice any fireworks

[fogged306]

Originally Posted by SALIV8 Originally Posted by 89LX347 ya i just put new MSD spark plug wires and made sure they were firmly on the cap and the spark plugs....no when i wash it it does it more than regular ..and agian this just started happening ..i just put new blaster coil wires and cap and rotor on it ..thanks for your help i will try to fing out sounds like an ingnition issue to me, if it gets worse when wet or humid. pop ur hood when its dark out and watch under neath when a buddy revs it see if u notice any fireworks

Yup, do that. and put some water in a spray bottle and spray a fine mist on the spark plug wires while you're doing that. Just make sure you are in a pretty dark area because sometimes the arc isn't that bright.

[89LX347]

alright hey guys its not the ignition...well it might be but there is no arcing at all...and i noticed that the cutting out goes away completly after i drive it a little bit...not after it warms up because i always wait tilll it warms up but after i drive it..any suggestions?

[SALIV8]

is the ecu throwing any codes? what's the fuel presure at? what injectors are you running

[sivart]

my car did the same thing, driving around normal it was fine but as soon as i got on it...lots of vibration...it cut out then back on, then finally it turned off all
together...turns out it was the wires that went to the starter, they were rubbing on the header and grounded out. so u can check that. i also thought it
could be my fuel filter and pump...

[89LX347]

alright so i havnt checked the codes yet BUT i have 30 # injectors and its around 40-42...it is inconsistent though...i will start it sometimes and it will be at 37 psi and then sometimes at 42psi