Has anyone ever had this problem on a Gsr? The problem is i tested the compression on all cylinders and they were 170psi for cylinder 1 3 and 4. but on cylinder number 2 the compression only yielded 120psi. There is no smoke coming from the exhaust it idles slightly rough but when driven the car seems to be doing fine. So i dont know what the problem could be, i replaced all the spark plugs and a week later i took them all out to look at, and cylinder number 2 spark plug was really black seemed like during idle cylinder number 2 just doestn work therefore the car idles rough and sounds like a wrx. IF anyone can give me some feedback i would greatly appreciate it, BTW i replaced the intake gasket and head gasket and resurfaced the head and still same problem. Thanks

 

Its your piston ring. Oil is coming up throgh the sleeve and around the piston. My motor has the same problem. My compresion is at 150 all of them, which is too low for a usdm gsr. I changed out the rings and put some ctr pistons in it. My motor never smoked either. It was just slow like a MF.

 

Do a leakdown test before you go diagnosing blown rings.

 

Can anyone also help me with my 99gsr i just replaced the piston rings after a compression test on my gsr, but now the compression is still kinda low.
my compression is now cylinder #1 148 #2 175 #3 150 #4 175 wtf. I changed everything in on the car. spark plugs, wires, dizzy, injectors, headgasket got the block honed and changed the rod bearings also. need help too sorry to get into your thread bro.

 

Vtec engine with only 170psi? My B18A1 had #1 - 165, #2 - 160, #3 - 170, #4 - 165psi.

Doesn't add up to me.

 

O.k before you guys go any further HUYNH your problem to my kowledge was not in your head but your bottom block you should have just either saved up more and did the head and block at the same time well its too late but look into rebuilding the bottom end #2 cylinder is most likly scared or a bad ring is your prob.

HUYNH what procedure did you use when breaking in the rebuilt motor??
Did a repudable mech/engine builder assemble the longblock?
Did you break in the rings and tune the motor before rechecking comp.??
Did you perform the comp. test correctly

 

yah i put brand new rings and cleaned the pistons, everything seemed fine and the machanic did a good job putting them in. The car was a stock rebuild 99 gsr and as soon as we turned the car on it ran shitty. Im thinking its the head now. Im gonna try a different head tomorrow and see if that fixes my problem. The problem is that the motor shakes a lot and idles really low. Turns off after you come to a stop, then drives fine around. I'm really frustrated with this car. help plz

 

your timing may be off was the distributor put back in the same spot? you say your mech put the pistons in are you sure he gaped the rings right and what was your piston to wall clearances? he may have not installed the rotating assembly correct. was the block balanced? try adjusting the timing from the distributor also your using the stock ecu correct? also reading back you say soon as it started it ran shitty that sounds like a timing problem! also you resurfaced the head if its too much it will cause your timing to be off!! so check those even bad comp. #'s you should still be able to drive the car without it shaking and idling low, where does it idle? if everything is stock and timing is dead on with a stock ecu you should be able to drive normally i ve done this on a rebuilt 98 gsr and it ran fine although i had it tunned after the break in on a hondata s100 ecu. check your timing before you take the head off and use a new hg if you do.

 

well it was just a stock rebuild, the walls looked cleaned and the he just put the rings in, i dont think he gapped them. I had a machine shop look at the walls and he said they were fine. I think the timing may be off too, but he checked the timing and he said it was fine. I dont trust this guy too much, but ive seen some motors he has build. He did the valve adjustment before we turned the motor on because they were really loose. I think its the valve adjustment that is messed up and too tight. I read that if the valve adjustement is too tight it will run like crap and cause misfire. My car sounds like a wrx, its missing cylinder 1 and 3. It also shuts off after you come to a stop from driving it. The ecu is stock and everything else is stock. Can the valve adjustement be messing it up? what else will cause the car to idle really low like at 100 rpms and shut off. especially when the car gets hot it gets worse.

 

i had the same issue in number 2 except my compression was 170 170 170 and 20 and it was my rings

 

I just changed my rings and the compression went up, but still low in two cylinderes

 

Hey i just fixed my gsr, it turned out that the valves were adjusted really tight. I just did a valve adjustment and the car runs beautiful now. Thanks to all that helped.

 

so your valves were to tight and cause your 2 cylinders to missfire well im glad its fixed.

 

x2

But it seems to me that your piston rings on cyl 2 are done. When you have a blown head gasket in that cly, you almost always have bad compression on cly #3, #2. and find milkly residue on your oil cap. Just hope that it's your rings and not your cylinder wall.
Just read that you found the problem, good for you...You didn't mention the valve adjustment before, always retrace what you just did, if something goes wrong....

 

yah i know its kinda weird. I didn't think that was the case either. I had so many machanics take a look at the car and they told me to get a new head, get new motor so i got on here and you guys helped a lot. I'm never taking my car to a shop again.

 

yea i don't get it either

when i did my compression test i did like 6 cranks

i had a gsr with type r head and cylinder 1-3 were in between 210-215
and cylinder 4 was about 145

 

It makes perfect since. If the valves were adjusted too tight they were not closing completely. It is pretty hard to adjust valves that tight though with out knowing it is incorrect... Doesn't sound like much of a mechanic.

 

I know that machanic sucked, but i had no other choice i didn't want to take it to the dealer. Its all good i did it myself and ive never touched internals. I learned how to change pistons, rings, rod barings and adjust valves. So at least i got heads up for the future. Honda-tech is a great help though.

 

Good job! Start saving some money doing your own work.

 

seriously! some mechs. are cons.! i bet he made them to tight so you can bend a valve and come back crying for him to fix it so he gets more $ iv seen it! I always do my own labor at least if something goes wrong you have no one to blame but your self lol. and its not rocket science but the more you do it the more experienced you get.

 

had the same problem with my gsr compression was wack low in couple cylinders thought it was the head gasket so i changed it and got the head shaved an no change, pulled that bia off again took it to a machine shop and bam it was the dam exhaust valve guides and seals, thought it was my rings but put it back on an compression is at 185 in all four and it rides like an ape should always check the top end for puttin money in the bottom cause hondas are infaumos for valve seals

 

dam thas an old post

 

I just did a dry compression test on my jdm b18c gsr from driver side over #s were 210 190 220 230 manual says 130 min-270 max with 30psi variations between intervals my engine was completely rebuilt honed & re-ringed in oct 09 car uses a lot of oil come to conclusion that its valve guides because valve job & oem valve seals were done at time of build

 

**** i have the same problem with mine. 99-gsr miss fired on #4. i swap new plug & wire that it. it idle kinda rough, check engine light is flashing, new plug,let car idle for 4-5 min, take out #4 plug is all black carbon on it. other plug look news.
did compression test all cylinder is around 165-170psi. it was making that clicking noise so i adjust all the valve intake:.007 ex. .008, torque 12P. still make that clicking noise from that miss fired cylinder. i inspect all the spring, no broken spring. i swap out the injector to a different cylinder and see if the miss fired followed but didn't. what i will try to do is, check dizzy timing, and cams, crank, drain oil tomorrow c if i have any metal, hopefully not. will probably do a leak down test too. gsr pretty much stock. anyone got any advices thanks....

 

Sounds like a burned valve but your compression is too good. It may be the valve seal for that cylinder letting oil in and fouling the plug. I'd check the valve clearance and the valve seals.