car still not running right....help! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

driftkid316 · 05-31-2006, 11:07 PM

hey fellas, i need your assistance. my car KA into ae86 swap is done, i just still cant get it running right. i can start it but would have to keep my foot ont he gas to keep it on sometimes. it would bog out and die if i tried to rev it slowly but if i rev'd it fast it would do fine. so i tried running the motor with no maf, and it idled fine and rev'd, up to about 2500 rpm, obviously cause no maf, slow or fast. so i figured i needed a new maf, and it ran a tad better but still the same symptoms. so could anyone help[ me out with this one, why does it feel fine with no maf, and shitty with one. im thinking my timing could be off but im pretty sure its really close. even if it was timing, why does it feel fine with no maf. help me out guys. thanks in advance

driftkid316 · 06-01-2006, 02:25 AM

no one can help?

**mrmephistopheles** · 06-01-2006, 02:46 AM

TPS in wrong position or fucked up?

NIK90s13 · 06-01-2006, 06:29 AM

Have to agree with the tps. I ran into a similar problem, tps fixed it.

tre · 06-01-2006, 08:36 AM

Check your vacuum lines. There is somewhat of a rats nest of them!

driftkid316 · 06-01-2006, 03:26 PM

how do i check if the tps is in the wrong position or if its working right? and if it wasnt working right, how come it doesnt have the same problems when the maf is unplugged.

and with the vacuums, i think i got all of em in the right places that are needed. and same as above, how come no problems wth no maf

tre · 06-01-2006, 03:32 PM

no maf is a Limp mode. it should BARELY run without it

driftkid316 · 06-01-2006, 03:36 PM

well it only revs up 2500, but the revs are smooth when reving fast or slow. not like when the maf is in, i can only rev high if i rev fast. but when i try to take it up slow, it starts bogging and dies.

gremlin · 06-01-2006, 03:38 PM

Quote:

Originally Posted by driftkid316

how do i check if the tps is in the wrong position or if its working right? and if it wasnt working right, how come it doesnt have the same problems when the maf is unplugged.

and with the vacuums, i think i got all of em in the right places that are needed. and same as above, how come no problems wth no maf

what engine is that off of? I might be able to help

driftkid316 · 06-01-2006, 03:41 PM

its a ka24de off of a 91 240.

gremlin · 06-01-2006, 03:42 PM

I have an online manual to every make of car from 1960. Do you want the link? You can access for free

driftkid316 · 06-01-2006, 03:45 PM

thanks but i already downloaded the FSM on to my comp.

tre · 06-01-2006, 04:34 PM

okay so no MAF smooth rev. MAF = horrible reving.

try a new ecu?

driftkid316 · 06-01-2006, 04:41 PM

i dont think its the ecu, maybe. but id rather try other stuff before getting another ecu. thanks for hte help guys. im still tryin to figure it out, would rather not take it to a shop

tre · 06-01-2006, 04:58 PM

borrow an ecu. hell junkyard finde an auto. any ka24de ecu will work haha :P

i'd like to actually be there and go througha diagnosis with ya. but you're far away haha

05-31-2006, 11:07 PM	#1
driftkid316 Zilvia Member Join Date: Apr 2005 Location: corona, ca Posts: 198 Trader Rating: (2) Feedback Score: 2 reviews	car still not running right....help! hey fellas, i need your assistance. my car KA into ae86 swap is done, i just still cant get it running right. i can start it but would have to keep my foot ont he gas to keep it on sometimes. it would bog out and die if i tried to rev it slowly but if i rev'd it fast it would do fine. so i tried running the motor with no maf, and it idled fine and rev'd, up to about 2500 rpm, obviously cause no maf, slow or fast. so i figured i needed a new maf, and it ran a tad better but still the same symptoms. so could anyone help[ me out with this one, why does it feel fine with no maf, and shitty with one. im thinking my timing could be off but im pretty sure its really close. even if it was timing, why does it feel fine with no maf. help me out guys. thanks in advance

06-01-2006, 08:36 AM	#5
tre Zilvia Junkie Join Date: Apr 2006 Location: Seattle, WA Posts: 544 Trader Rating: (0) Feedback Score: 0 reviews	Check your vacuum lines. There is somewhat of a rats nest of them! __________________ I didn't buy an Audi because it is a Great Car, but for more of a reason to be an asshole.

06-01-2006, 03:32 PM	#7
tre Zilvia Junkie Join Date: Apr 2006 Location: Seattle, WA Posts: 544 Trader Rating: (0) Feedback Score: 0 reviews	no maf is a Limp mode. it should BARELY run without it __________________ I didn't buy an Audi because it is a Great Car, but for more of a reason to be an asshole.

06-01-2006, 04:34 PM	#13
tre Zilvia Junkie Join Date: Apr 2006 Location: Seattle, WA Posts: 544 Trader Rating: (0) Feedback Score: 0 reviews	okay so no MAF smooth rev. MAF = horrible reving. try a new ecu? __________________ I didn't buy an Audi because it is a Great Car, but for more of a reason to be an asshole.

06-01-2006, 04:58 PM	#15
tre Zilvia Junkie Join Date: Apr 2006 Location: Seattle, WA Posts: 544 Trader Rating: (0) Feedback Score: 0 reviews	borrow an ecu. hell junkyard finde an auto. any ka24de ecu will work haha :P i'd like to actually be there and go througha diagnosis with ya. but you're far away haha __________________ I didn't buy an Audi because it is a Great Car, but for more of a reason to be an asshole.

06-01-2006, 02:25 AM	#2
driftkid316 Zilvia Member Join Date: Apr 2005 Location: corona, ca Posts: 198 Trader Rating: (2) Feedback Score: 2 reviews	no one can help?

06-01-2006, 06:29 AM	#4
NIK90s13 Zilvia Junkie Join Date: Jan 2006 Location: texas Age: 58 Posts: 471 Trader Rating: (0) Feedback Score: 0 reviews	Have to agree with the tps. I ran into a similar problem, tps fixed it.

06-01-2006, 03:26 PM	#6
driftkid316 Zilvia Member Join Date: Apr 2005 Location: corona, ca Posts: 198 Trader Rating: (2) Feedback Score: 2 reviews	how do i check if the tps is in the wrong position or if its working right? and if it wasnt working right, how come it doesnt have the same problems when the maf is unplugged. and with the vacuums, i think i got all of em in the right places that are needed. and same as above, how come no problems wth no maf

06-01-2006, 03:36 PM	#8
driftkid316 Zilvia Member Join Date: Apr 2005 Location: corona, ca Posts: 198 Trader Rating: (2) Feedback Score: 2 reviews	well it only revs up 2500, but the revs are smooth when reving fast or slow. not like when the maf is in, i can only rev high if i rev fast. but when i try to take it up slow, it starts bogging and dies.

06-01-2006, 03:41 PM	#10
driftkid316 Zilvia Member Join Date: Apr 2005 Location: corona, ca Posts: 198 Trader Rating: (2) Feedback Score: 2 reviews	its a ka24de off of a 91 240.

06-01-2006, 03:42 PM	#11
gremlin Join Date: Jun 2006 Location: kansas Posts: 17 Trader Rating: (0) Feedback Score: 0 reviews	I have an online manual to every make of car from 1960. Do you want the link? You can access for free

06-01-2006, 03:45 PM	#12
driftkid316 Zilvia Member Join Date: Apr 2005 Location: corona, ca Posts: 198 Trader Rating: (2) Feedback Score: 2 reviews	thanks but i already downloaded the FSM on to my comp.

06-01-2006, 04:41 PM	#14
driftkid316 Zilvia Member Join Date: Apr 2005 Location: corona, ca Posts: 198 Trader Rating: (2) Feedback Score: 2 reviews	i dont think its the ecu, maybe. but id rather try other stuff before getting another ecu. thanks for hte help guys. im still tryin to figure it out, would rather not take it to a shop