sputtering
#1
brotary
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sputtering
so i just replaced my fp in my tII with an fd fuel pump over 2 weeks ago and it's been running amazing....well, until now.
i drove it to class today and it was fine, but while leaving, i sputtered in first gear at 3500rpms and i wanted to shoot someone. so i drive some more and head off to work delivering pizzas...which sucked tonight.
instead of idling at 1100 like it used to, now it's idling at about 500-600 and sputters. it sounds like it's misfiring when i rev up in neutral.
at 10% throttle im okay, sputters a little, but okay.
at 15% throttle im at sputter central
but at about 75% throttle im okay..just like 10%
when i sputter, my afr reads lean (naturally)
in second gear at 3800-4100 rpms i sputter hardcore.
injectors? sparkplugs? ideas?
i drove it to class today and it was fine, but while leaving, i sputtered in first gear at 3500rpms and i wanted to shoot someone. so i drive some more and head off to work delivering pizzas...which sucked tonight.
instead of idling at 1100 like it used to, now it's idling at about 500-600 and sputters. it sounds like it's misfiring when i rev up in neutral.
at 10% throttle im okay, sputters a little, but okay.
at 15% throttle im at sputter central
but at about 75% throttle im okay..just like 10%
when i sputter, my afr reads lean (naturally)
in second gear at 3800-4100 rpms i sputter hardcore.
injectors? sparkplugs? ideas?
#3
brotary
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shitty highway. the afr will go to lean if i give it too much or too little throttle...stoich when i give it just the right amount.
ill check for vacuum leaks tomorrow when it's light out
ill check for vacuum leaks tomorrow when it's light out
#5
Just take the blue pill..
Check your TPS, AFM, and the connections on your fuel injectors. Also, do a leak test on your air inlet duct and all of the larger vacuum lines. I think one of those items may be the culprit. Good luck!
#7
brotary
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so im going to the store to pick up new plugs.
ive searched but found mostly spark plug setups for 12a's.
what should i use for leading? BUR7EQ ?
what should i use for trailing? BUR9EQ ?
stock 13bt
NGK BR8EQ14?
and do the fuel injector cleaner additives (ie. chevron techron) actually work?
ive searched but found mostly spark plug setups for 12a's.
what should i use for leading? BUR7EQ ?
what should i use for trailing? BUR9EQ ?
stock 13bt
NGK BR8EQ14?
and do the fuel injector cleaner additives (ie. chevron techron) actually work?
Last edited by marK's; 01-18-08 at 05:24 PM.
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#8
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I put a little MMO in the tank just on the idea of thinking it will clean things up a little bit. Then, I plan to put a little 2 stroke oil in to oil things. The next step (after cleaning the intank filter and a new fuel filter) is to take out the injectors and send them away to a guy who cleans them. I think it is around $40. He is talked about on here so he should be easy to find.
#9
brotary
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ok here's a little update. the car takes about 5-6 seconds to hit redline in neutral.
i put chevron techron in the gas tank and im letting it run right now.
add coolant light pops on and off, but has been doing that for the past 2 or 3 weeks and i've burped and added coolant in the overflow and neck.
i did a compression check by ear. i unplugged the leading trailing plug and got even pulses and same with the rear.
psh...psh...psh...psh..kinda like that
changed spark plugs 7's in lead and they only had one 9 for trailing and i have to pick the other one up tonight. all plugs had a lot of carbon deposit and **** on them. the only plug that wasnt new is the trailing rotor 1 plug.
i unplugged the trailing plug from rotor 1 and nothing changed performance wise..it revved the same. i think the same goes for rotor 2 trailing. coil and ignitor busted? when i unplugged the wires, i still saw arcs.
rotor 1 leading plug had a good amount of oil on it.....
not the AFM or MAFS whatever mazda calls it. i unplugged it and it got worse
fuel filter coming in tonight.
i put chevron techron in the gas tank and im letting it run right now.
add coolant light pops on and off, but has been doing that for the past 2 or 3 weeks and i've burped and added coolant in the overflow and neck.
i did a compression check by ear. i unplugged the leading trailing plug and got even pulses and same with the rear.
psh...psh...psh...psh..kinda like that
changed spark plugs 7's in lead and they only had one 9 for trailing and i have to pick the other one up tonight. all plugs had a lot of carbon deposit and **** on them. the only plug that wasnt new is the trailing rotor 1 plug.
i unplugged the trailing plug from rotor 1 and nothing changed performance wise..it revved the same. i think the same goes for rotor 2 trailing. coil and ignitor busted? when i unplugged the wires, i still saw arcs.
rotor 1 leading plug had a good amount of oil on it.....
not the AFM or MAFS whatever mazda calls it. i unplugged it and it got worse
fuel filter coming in tonight.
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