Ask Xulfiqar - An Automotive Encyclopedia

[Xulfiqar]

@Xulfiqar

i am setting up a 1jzgte vvti from a JZS171 Toyota crown Majesta, maybe you remember in a Nissan skyline R32 gtst 4 door. so far the car is ready but i am stuck with the MAF sensor configuration. i have connected three different maf sensors but the ecu doesnt correct the AFR, and the engine keeps runing rich and crapy. lots of back fires, and black smoke, and no rev limit, rpm goes around 8k.

the ecu i am using is of Auto gear but i have a manual gear, i dont think so it should be a problem as i read on supra forums that the ecu just gives auto gear sensor codes, but the engine runs fine with the manual gears. i need someone to check my wiring or give me some kind of information which can help me out. perhaps a troubleshooting flow.

thanks in advance.

have you verified the wiring is correct for your ECU? and what MAF are you using?

[Xulfiqar]

From where can i switch it on off? If the buzzer is dead how can i fix it and where is the buzzer located? Btw thanks for quick reply.

find someone with a nissan consult scanner and ask them to go into the body control system and test the chime and lamps etc.

[trouble_maker]

Hey xulfiqar
I own a N/A 4d56 in first gen 3 door pajero so I want to stick a small turbo to it so how much boost a 4d56 on stock internal can bear

Bump...

[Rustle]

find someone with a nissan consult scanner and ask them to go into the body control system and test the chime and lamps etc.

There are no settings in the meter :(. Can i fit new buzzer and tell me the location of the buzzer!

[Xulfiqar]

Bump...

the turbo version uses extra cooling jets and modified pistons. along with a different injection pump which increases fuel delivery, you can hang a smallish turbo on it and boost it about 3 or 4 psi with just a smidge more fuel, it will clean up the exhaust and also quieten out the engine, but please remember that a slight overhanded approach with fuelling in a diesel can lead to a dead engine very quickly.

[Xulfiqar]

There are no settings in the meter :(. Can i fit new buzzer and tell me the location of the buzzer!

In typical nissan fashion the BCM should be part of the interior fuse box or behind it.

[shezyworld]

have you verified the wiring is correct for your ECU? and what MAF are you using?

yes, i have verified the wiring, paid 15 dollars to get the exact wiring pin outs for my ECU. its a JZS171, and the part number for JZS171 is 22204-46020 , i purchased it from ebay and got it here in pakistan through a friend in USA. but that sensor face came up all rubbed off, means there was no part number printed on it. however that maf did not worked, i have another maf which is different in shape and part number from a toyota 4runner, when i connect the 4runner maf it runs but very rich and black smoke, hits a fuel cut around 4k rpm right after the boost is about to come, also it dies on idle and when i connect the maf which i got from ebay, the engine restricts the rpm on around 2.5 rpm, but no black smoke.

4runner maf https://www.google.com.pk/search?q=toyota+4runner+turbo&biw=1242&bih=606&tbm=isch&imgil=YiIFPbA-12MBQM%253A%253B8KTXwuljBrTJsM%253Bhttp%25253A%25252F%25252Fwestcountyexplorersclub.com%25252F2012%25252F12%25252F22%25252Fspotted-1986-toyota-4runner-sr5-turbo-for-sale%25252F&source=iu&pf=m&fir=YiIFPbA-12MBQM%253A%252C8KTXwuljBrTJsM%252C_&usg=x3b5mqIJsNCqpW6t3ubRDGNCeF4%3D&ved=0ahUKEwiK1fDWyM_NAhVIWxoKHXg2BM8QyjcILg&ei=2fd0V8qEBci2afjskPgM#tbm=isch&q=toyota+4runner++maf+sensor&imgrc=vhUAdi0QBt2UrM%3A

JZS171 maf https://www.google.com.pk/search?q=toyota+4runner+turbo&biw=1242&bih=606&tbm=isch&imgil=YiIFPbA-12MBQM%253A%253B8KTXwuljBrTJsM%253Bhttp%25253A%25252F%25252Fwestcountyexplorersclub.com%25252F2012%25252F12%25252F22%25252Fspotted-1986-toyota-4runner-sr5-turbo-for-sale%25252F&source=iu&pf=m&fir=YiIFPbA-12MBQM%253A%252C8KTXwuljBrTJsM%252C_&usg=x3b5mqIJsNCqpW6t3ubRDGNCeF4%3D&ved=0ahUKEwiK1fDWyM_NAhVIWxoKHXg2BM8QyjcILg&ei=2fd0V8qEBci2afjskPgM#tbm=isch&q=22204-46020&imgrc=2vuUMcG02R5XYM%3A

as far as the wiring is concerned. i have a full pinout writeup pin to pin and in detail. including the maf wiring. i have asked my electrician to verify the wiring according to the data i have provided, he says its according to it. but i havent seen him doing that, he just says its according to it. i dont know if he is lieing or telling the truth. i have also discussed this issue with the guy in usa from whom i bought the pinouts, he said it is definitely wiring issue. now i am stuck with an abnormal running engine bcoz of just a freaking maf sensor.

[trouble_maker]

the turbo version uses extra cooling jets and modified pistons. along with a different injection pump which increases fuel delivery, you can hang a smallish turbo on it and boost it about 3 or 4 psi with just a smidge more fuel, it will clean up the exhaust and also quieten out the engine, but please remember that a slight overhanded approach with fuelling in a diesel can lead to a dead engine very quickly.

First of all thanks for reply yes I know that overfueling a diesel will make it run extreme hot and will eventually melt piston down

[Xulfiqar]

yes, i have verified the wiring, paid 15 dollars to get the exact wiring pin outs for my ECU. its a JZS171, and the part number for JZS171 is 22204-46020 , i purchased it from ebay and got it here in pakistan through a friend in USA. but that sensor face came up all rubbed off, means there was no part number printed on it. however that maf did not worked, i have another maf which is different in shape and part number from a toyota 4runner, when i connect the 4runner maf it runs but very rich and black smoke, hits a fuel cut around 4k rpm right after the boost is about to come, also it dies on idle and when i connect the maf which i got from ebay, the engine restricts the rpm on around 2.5 rpm, but no black smoke.

4runner maf https://www.google.com.pk/search?q=toyota+4runner+turbo&biw=1242&bih=606&tbm=isch&imgil=YiIFPbA-12MBQM%253A%253B8KTXwuljBrTJsM%253Bhttp%25253A%25252F%25252Fwestcountyexplorersclub.com%25252F2012%25252F12%25252F22%25252Fspotted-1986-toyota-4runner-sr5-turbo-for-sale%25252F&source=iu&pf=m&fir=YiIFPbA-12MBQM%253A%252C8KTXwuljBrTJsM%252C_&usg=x3b5mqIJsNCqpW6t3ubRDGNCeF4%3D&ved=0ahUKEwiK1fDWyM_NAhVIWxoKHXg2BM8QyjcILg&ei=2fd0V8qEBci2afjskPgM#tbm=isch&q=toyota+4runner++maf+sensor&imgrc=vhUAdi0QBt2UrM%3A

JZS171 maf https://www.google.com.pk/search?q=toyota+4runner+turbo&biw=1242&bih=606&tbm=isch&imgil=YiIFPbA-12MBQM%253A%253B8KTXwuljBrTJsM%253Bhttp%25253A%25252F%25252Fwestcountyexplorersclub.com%25252F2012%25252F12%25252F22%25252Fspotted-1986-toyota-4runner-sr5-turbo-for-sale%25252F&source=iu&pf=m&fir=YiIFPbA-12MBQM%253A%252C8KTXwuljBrTJsM%252C_&usg=x3b5mqIJsNCqpW6t3ubRDGNCeF4%3D&ved=0ahUKEwiK1fDWyM_NAhVIWxoKHXg2BM8QyjcILg&ei=2fd0V8qEBci2afjskPgM#tbm=isch&q=22204-46020&imgrc=2vuUMcG02R5XYM%3A

as far as the wiring is concerned. i have a full pinout writeup pin to pin and in detail. including the maf wiring. i have asked my electrician to verify the wiring according to the data i have provided, he says its according to it. but i havent seen him doing that, he just says its according to it. i dont know if he is lieing or telling the truth. i have also discussed this issue with the guy in usa from whom i bought the pinouts, he said it is definitely wiring issue. now i am stuck with an abnormal running engine bcoz of just a freaking maf sensor.

you will need to trace each wire yourself first, asking the lektrishaan to do this job is completely useless as it would take him all day to trace it - unless you are paying him a whole day's business earnings dont expect any job.

Verify MAF wiring is intact and correct and then proceed to see what is wrong

[Fahad.Ayub]

Salam Xulfiqar bhai
Need your opinion on a few things
*The A/T in our CRV shudders after the TC locks up what to do ?
*the car is 131k kms driven and would it be worthwhile to replace the fuel filter and get injectors cleaned ?
*don't have the JDM owners manual uk and us ones suggest using 5w20 api
*any other suggestion regarding preventative maintenance
Waiting for your reply

[moizadil]

Hello everyone. I have a baleno that I think has been running with water in the radiator since day 1. It has clocked around 70k. Now I want to replace the water with coolant. I need advice on how to do it? Should I just drain the radiator and fill up the coolant or will there be extra steps?

And what coolant to use and the estimated price? Thank you.

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[mmsiddique]

what are the running pressures of the system and does the performance at idle improve with extra cooling of the condenser (pouring water on it) or improves only with additional rpm?

running pressure 60 and 350
throwing water improved cooling. reving engine has no effect if vehicle is standing.
additionally, engine has blow currently, so mechanic says there is no cure to this problem as "engine heat uthaa raha hai"

[Xulfiqar]

Salam Xulfiqar bhai
Need your opinion on a few things
*The A/T in our CRV shudders after the TC locks up what to do ?
*the car is 131k kms driven and would it be worthwhile to replace the fuel filter and get injectors cleaned ?
*don't have the JDM owners manual uk and us ones suggest using 5w20 api
*any other suggestion regarding preventative maintenance
Waiting for your reply

you need to flush out the ATF - that should take care of the shudder, If it doesnt then there are some additives that can help but they are american and not available in retail in Pakistan.

at 130K - check the filter and change if its original install - leave the injectors alone, you can use 5w20 oil in there if you wish, 5w30, 10w30 etc also work, 10w40 too - make sure to get the specification it requires.

[Xulfiqar]

running pressure 60 and 350
throwing water improved cooling. reving engine has no effect if vehicle is standing.
additionally, engine has blow currently, so mechanic says there is no cure to this problem as "engine heat uthaa raha hai"

you just solved your issue, the system is overloaded - at 350 psi liquid, I beleive the outside temperature is quite high and the 60 on low also says that (about closing to 50C ambient). this slightly higher low side can also be a sticky expansion valve due to moisture in the system. (not vacuuming)

anyway you have a condenser cooling issue or some adulteration in the system.

injun back maarda haur heat utha riya see???

change your mechanic - this current one is useless.

[Xulfiqar]

Hello everyone. I have a baleno that I think has been running with water in the radiator since day 1. It has clocked around 70k. Now I want to replace the water with coolant. I need advice on how to do it? Should I just drain the radiator and fill up the coolant or will there be extra steps?

And what coolant to use and the estimated price? Thank you.

Sent from my 0PJA2 using PW Forums mobile app

to get pricing, you will need to phone shops or visit them, to change a rusted out system you need to acid flush it out first otherwise your new coolant will become rusty too.

search for the procedure on this site.

[Fahad.Ayub]

you need to flush out the ATF - that should take care of the shudder, If it doesnt then there are some additives that can help but they are american and not available in retail in Pakistan.

at 130K - check the filter and change if its original install - leave the injectors alone, you can use 5w20 oil in there if you wish, 5w30, 10w30 etc also work, 10w40 too - make sure to get the specification it requires.

Thank you
BTW I got hold of some lubeguard shudder fix just in case[emoji14]

[moizadil]

to get pricing, you will need to phone shops or visit them, to change a rusted out system you need to acid flush it out first otherwise your new coolant will become rusty too.

search for the procedure on this site.

Thank you brother I'll look that up and do it. Btw, is coolant worth it?

I need a little but of more advice, please help. I was cleaning the throttle body today and while looking at the intake pipe near the air filter box I notice a piece of metal was taped to it to restrict air flow. It can be seen in the picture, suppose my hand is the pipe and the metal was strapped in this position. Upon disconnecting the pipe when I tried to reach the throttle body that was about another round steel object (picture given) attached to the throttle body, I think it is for cng and was restricting the air flow. I removed both these objects and cleaned the throttle body thoroughly using a carb cleaner. The throttle body was very dirty.

So my question here is that I've removed both these steel objects which were restricting air flow and started the car and did the idle relearn process. The car is running so much better with much increased performance now but I'm worried that removing these 2 objects will somehow damage the engine. Please give me your advice on how will removing these 2 things will affect the engine and the fuel mileage?

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[Xulfiqar]

Thank you
BTW I got hold of some lubeguard shudder fix just in case[emoji14]

lubegard shudder fix as in "Dr Tranny shudder fix tube" or one of their 8 oz bottles of additive/conditioner

[Fahad.Ayub]

Got 2 (2oz tubes) of Dr tranny instant shudder fix
Was mentioned quite a lot times on crv forums so got these from uk

[umarkhan1]

Thank you brother I'll look that up and do it. Btw, is coolant worth it?

I need a little but of more advice, please help. I was cleaning the throttle body today and while looking at the intake pipe near the air filter box I notice a piece of metal was taped to it to restrict air flow. It can be seen in the picture, suppose my hand is the pipe and the metal was strapped in this position. Upon disconnecting the pipe when I tried to reach the throttle body that was about another round steel object (picture given) attached to the throttle body, I think it is for cng and was restricting the air flow. I removed both these objects and cleaned the throttle body thoroughly using a carb cleaner. The throttle body was very dirty.

So my question here is that I've removed both these steel objects which were restricting air flow and started the car and did the idle relearn process. The car is running so much better with much increased performance now but I'm worried that removing these 2 objects will somehow damage the engine. Please give me your advice on how will removing these 2 things will affect the engine and the fuel mileage?

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Are you using cng?

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