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1G 3&4 cylinders are not working

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sakroda

Proven Member
145
14
May 3, 2016
İstanbul, Europe
Hello
My engine is started to shake suddenly. the engine was shaking when I pressed the gas..I pull out 3&4 injector cables so nothing change but when i pull out the 1&2 injector cable so engine dies There is no CEL and i have datalogger i can not get any error so I started to control my car;I am turning off injectors from MMCD i can not see any difference when i turn off the 3&4 injectors
I have checked firing( I can see parks on all 4 cylinders)
Injectors resistor ohms 0.7
injector ohms are same 0,34
CAS: pin1:4v pin2:5v pin3:12V pin4: ground When i start the engine and hooked the wire pin1:1,82v pin2:2v pin3:12V pin4:ground(so they are normal values? when i spin the cas to clockwise i hear something but i am not sure injectors are working?
I have changed the spark plugs and it s all the same
I did not check coil and ignition module because i can see sparks on all cylinders
I will remove injectors and i will check they work or not
Do you have an idea? what's wrong with my car?What would you suggest to do?pls help
 
Hello
My engine is started to shake suddenly. the engine was shaking when I pressed the gas..I pull out 3&4 injector cables so nothing change but when i pull out the 1&2 injector cable so engine dies There is no CEL and i have datalogger i can not get any error so I started to control my car;I am turning off injectors from MMCD i can not see any difference when i turn off the 3&4 injectors
I have checked firing( I can see parks on all 4 cylinders)
Injectors resistor ohms 0.7
injector ohms are same 0,34
CAS: pin1:4v pin2:5v pin3:12V pin4: ground When i start the engine and hooked the wire pin1:1,82v pin2:2v pin3:12V pin4:ground(so they are normal values? when i spin the cas to clockwise i hear something but i am not sure injectors are working?
I have changed the spark plugs and it s all the same
I did not check coil and ignition module because i can see sparks on all cylinders
I will remove injectors and i will check they work or not
Do you have an idea? what's wrong with my car?What would you suggest to do?pls help

I would check to make sure the 3rd and 4th injectors are not clogged with anything. Have you done a compression test?
 
I would check to make sure the 3rd and 4th injectors are not clogged with anything. Have you done a compression test?

Swap injector from 1,2 to 3,4 and see if the miss changes, if it didn’t then valves/compression or you have a big boost leak at the intake manifold gasket.
thanks for response i need to fix that problem I didn t have problem but I removed the turbo before this happened but i drove one hour with no problem it happened suddenly and car didn t work 2 weeks due to radiator I ordered a new radiator from Germany I waited it to come my town
Today I am going to remove fuel rail i will put plastic bottle to injectors and i will see the injector pressure after then i will do compression test but my engine is new maded it happened 1 year ago
pls keep in touch I need to fix that No one understand my car in Turkey I have datalogger also I want you to know it
 
thanks for response i need to fix that problem I didn t have problem but I removed the turbo before this happened but i drove one hour with no problem it happened suddenly and car didn t work 2 weeks due to radiator I ordered a new radiator from Germany I waited it to come my town
Today I am going to remove fuel rail i will put plastic bottle to injectors and i will see the injector pressure after then i will do compression test but my engine is new maded it happened 1 year ago
pls keep in touch I need to fix that No one understand my car in Turkey I have datalogger also I want you to know it

No problem at all, do what Miguel said to do. Once you start doing more tests you can eliminate more possible causes.
 
:((((((((
I put the water bottle in to injectors so 3&4 injectors are weak and i had smile on my face so i thought i have 560 cc injectors i will replace with them so nothing changed it s same when i press the gas pedal, engine is shaking:( by the way i broken the spark plug cable:) i will replace it tomorrow..
 
You only have a few things to check if you have cylinders not firing

Plugs
Wires
Transistor
Coil pack
ECU
Wiring

If its fuel and not spark you can also check

Injectors
Injector wiring
resistor pack
 
Swap injector from 1,2 to 3,4 and see if the miss changes, if it didn’t then valves/compression or you have a big boost leak at the intake manifold gasket.
hello
I changed sparks and wires nothing changed and i also replaced injectors so i put 560 cc injectors that s why i had to replace 2G maf and its all the same
please have a look to video. car is struggling between 750-2500 rpm after then its fine..i can reach to 5500 rpm
Please don t get wrong sak sak sak sound it comes from clutch when i press clutch it goes

You must be logged in to view this image or video.
 
Looks like vacuum leak which it stabilizes at high throttle.

Do a boost leak to rule that out.

In a side note. Changing parts/injectors just like that makes harder to get to the actual problem.

Let say if the injectors aren’t good ether, you end up with the same problem and will look for the problem everywhere else but the injectors (which are the culprit)., I know is to much coincidence to have the exact same injectors (3,4) being bad, but has happen.

However, do a boost leak and see what you find
 
Looks like vacuum leak which it stabilizes at high throttle.

Do a boost leak to rule that out.

In a side note. Changing parts/injectors just like that makes harder to get to the actual problem.

Let say if the injectors aren’t good ether, you end up with the same problem and will look for the problem everywhere else but the injectors (which are the culprit)., I know is to much coincidence to have the exact same injectors (3,4) being bad, but has happen.

However, do a boost leak and see what you find
what about my timing? I took a picture at same time
 

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Your pictures are not at a good angle to tell and as stated the mark isn't on the balancer. Its on the crank sprocket. Can't tell anything from those pics
 
i made compression test today 1&2 cylinders are 135 psi and 3&4 pistons are 30 psi we found problem so where is it? piston rings or
head gasket? there is a way to find without leak down test? dropping oil to 3&4 cylinders?
 
Last edited:
hello again
we found the problem so head gasket is gone as shown picture and i could not use my head because there is no surface on the head that s why i had to find a new head but i couldn t find a 2.0 head so i found 1.6 4g61 head and we install it to my talon so i tested the compression so all cylinders are 135 psi but car is not going like before:(( there is big engine noise but it s not going very well i just get TPS sensor error... problem is TPS? i will adjust it but 1.6 head makes problem for me? i read article many people uses 1.6 head so Did i miss something or i had to do something on 1.6 head?by the way my pistons are 300zx previous owner could not find pustons in Turkey maybe he found alternative:)
 

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300zx pistons? Assuming you could make these work if that picture is at tdc the piston isn't even at the top of the bore. Please elaborate.
 
i drove like that since 1 year there is a no problem as i told you previous owner couldn t import from usa and i guess he thought that kind of idea:) so i change the head gasket i feel power lose:( that s why i am asking is there a problem with my 1.6 head?Do you have an idea?
 
1.6 head combustion chamber is different than 4g63. I want to say its smaller which would up compression. From what I see your compression problem is pistons. Please elaborate on this install.
 
thanks for response but when i bought this car it allready done this modification that s why i can t elaborate about this engine i am sorry so i took a pictures before installed and pls have a look my old head can you discribe what it s from?? 1.6 or 2.0

1.6 head combustion chamber is different than 4g63. I want to say its smaller which would up compression. From what I see your compression problem is pistons. Please elaborate on this install.
 

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300zx pistons? Assuming you could make these work if that picture is at tdc the piston isn't even at the top of the bore. Please elaborate.
He already posted this some weeks back in Facebook and I have already told this guy that the VG30 pistons are not alternative unless he has 3mm longer rods. otherwise the pistons would be 3mm below deck and he would have only approx 7.1 static compression ration and terrible combustion efficiency. And the cylinders are 0.080-0.120" oversize already, so this block wouldn't accept 4g63 pistons unless he sleeves.
 
i am not tech guy as like you but before installed head my 0-100 was 7 seconds i didn t have problem with performance after installed the new head i lost hp maybe i feel like that or we talk about same thing;)
He already posted this some weeks back in Facebook and I have already told this guy that the VG30 pistons are not alternative unless he has 3mm longer rods. otherwise the pistons would be 3mm below deck and he would have only approx 7.1 static compression ration and terrible combustion efficiency. And the cylinders are 0.080-0.120" oversize already, so this block wouldn't accept 4g63 pistons unless he sleeves.
 
It has already been pointed out you have the wrong pistons in the car. You will never sort this out unless you start listening to the advice of the experienced and get rid of the parts that are not appropriate for this platform.
 
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