mightyajax

Hi everybody i have an issue with a slight but noticable vibration when my car is fully stopped in drive. If i put it in neutral it goes away and if i put it back in drive it comes back. If i turn the ac on it gets stronger -- this is why i think the issue might be with the crank pulley or other pulleys. Now the other thing i noticed: every day on my way to work i have make a u turn from a slight incline and while i wait for oncoming traffic to pass -- fully stopped on an incline with steereing wheel about 50% turned to the left and there's absolutely zero vibration, you cant even tell if the engine is on, runs butter smooth -- this is why i think the issue might be with cv axles. Engine is 251 and trans is TZ1A. Replaced engine mounts and trans mount, replaced spark plugs and wires, sent fuel injectors through cleaning machine. ofcourse all filters are good and its not a missfire Thanks

sound really nice man good job. what kind of exhaust to you have?

Thanks for your post. Now I've looked up 2nd gen MAFs and they don't look anyting like mine: My wiring has a rectangle 4-pin connector though. And also about compression test. My numbers are kinda? low: 1st cyl is 90psi and others are 130 psi. Should I even bother with working on this engine really? It's easier and cheaper to get an engine from a salvage yard than rebuild existing one (where I live at least)

yeah well basic info just says "EJ20" I already knew that. Need to know exact spec though

Thanks! What type of fuel injectors does yours have?

My engine isn't original in the car and I don't know what is it and I don't have previous owner's contact anymore. How to tell which engine is it? It's a EJ20 DOHC for sure and previous owner said it was a twin turbo without the turbos. Also intake manifold is two parts welded together (I presume top part is from N/A engine as it is thinner compared to bottom part). Fuel rail has red injectors labeled A46-00. The problem is rough idle and the whole car is jerking while on idle. If I give it a little bit of gas it stops jerking. And also exhaust reeks like petrol really bad. I believe I have incorrect MAF sensor in it. It has green sticker MAF now (AA160 code) and I believe twin turbos should have either blue sticker (AA200 code) or purple sticker (AA280 code). I think it's running to rich since turbo MAFs are designed to provide more air and I have N/A MAF installed.

I believe US market didn't get the 2nd gen GT models? Don't know if 2nd gen has OBD1 scan tool connector at all but they have this feature called "self"-diagnostics. You'll have to remove the plastic housing under the steering wheel and look for two black connectors just dangling around. While ignition is off, connect these two pins and turn ignition on and count how many times check engine light is blinking. Long blink = tens and short blink = ones. e.g. 3 long blinks and 2 short blinks equals code 32 ("Oxygen sensor or circuit"). Starting the engine with these two connectors engaged will remove any errors from ECU.

So. I really hoped it wasn't a compression problem. A few days back I went to a local subie repairs shop and they diagnosed bad fuel injectors and I've told them about coil pack and IACV and MAF stuff. So we ran a compression test and voi la - cyl#1 has 6 bar and others have 9 bar out of 11 normal. They proposed a theory that car was running too rich all the time because of bad fuel injectors and it caused piston rings to wash out and degrade. So I used this product for piston rings: and changed oil after that and also used this oil additive. Don't know how good it's gonna be but I hope it gets me through winter and I'll probably sell this car then. Thank for your help @doublechaz

So I changed coolant temp sensor hoping it would fix cold starts cause a few people messaged me they had same problem. This morning temperature was just below freezing, about -2 C and very humid, and car didn't start easily. Now it used to throw an error for coolant temp sensor (code 21) and when changing I didn't disconnect the battery so maybe error was still in the memory? On my lunch break I went and disconnected battery for a minute and then scanned for errors and it didn't have any codes whatsoever. In the eveninng when I went home car started fine, temp was about -6 then. Also one thing I noticed: turns out my off-brand MAF was causing all this poor idling and jerking. I took an old original MAF from a guy i know and put it in my car and all of a sudden it idled a LOT better. Still a bit rough but probably that old MAF was faulty cause it was just lying around in his garage in a box of random junk. Also checked for head gasket leak symptoms and coolant was clear no signs of emulsion, oil dip stick had normal oil in it. Something I also saw online is you could open coolant reservoir cap (not radiator cap) and look for bubbles and I didn't have any. So I guess head gasket is fine? Now all this got me thinking, could my bad MAF cause these poor starts? Cause ignition is fine, fuel systems seems fine, head gasket seems fine, car has decent power now after I replcaed coil pack. One thing that is known bad is MAF. Also didn't have a chance to run a compression test cause I personally don't have the tool and the guy I planned to lending it from was out of town.

Yeah I really hope it's fuel or temp sensor thing. Cheers

didn't mean to send this twice sorry

Also. I've messaged my local subie group chats and three people said it looks like temp sensor issue. One guy said he had same problem

So I've been saving worst for last. Cam sensor was good, I've disconnected it while car was running and it stalled so it definetely works. One more thing I noticed is despite I've replaced spark plug wires one of them was still shorting (if I touched it I would feel a strong discharge). I thought bad coil pack so I found a know good but used one and got it replaced. Don't know about fuel economy yet but power has noticably imporved. Car now goes 60kph in 3rd gear @ about 2500-3000 rpm so that's nice. This morning however tempreture was just about freezing and cold start wasn't easy. Also replaced starter motor cause I busted original one. Still, while idling, car is jerking and I think missfiring probably? Tomorrow I'll go and check fuel injectors and I hope it's the problem and also I'll check compression. Now about bad compression. I really hope it's alright BUT if it's not... That means piston rings right? Really expensive job

So I bought correct spark plugs this weekend (1 plug cost more than 4 old plugs lol. Old set was $10.26 and new set was $46.64). It did start in the morning but it was still difficult. Also I started it at night to see if plug wires were shorting but didn't see any sparks on them. Also put 95 octane petrol in it. This morning I read error codes and it said 13 - camshaft position sensor. Could this be my problem? Also somebody recommended me to use 5W30 oil. Should I bother changing it now? My 10W40 did less than 1000km since last change.

Thanks. So installing better CCA battery won’t help me right? Fuel pump and fuel filter change was about a month ago Oil is 10w40