marky2014

Hi everyone new here.

I need skme help, iv got a 1999 honda accord 2.0 vtec single cam,
When I first bought it, it had a lot of power especially I vtec but about a month later it stoppdd, iv searched everywhere for answears even checking intake for blocks, block pipes, spark plugs changed, oil changed and engime flushed, but I cannot find the problem,

Power up to vtec is really crap now, like its stopping itself, it wants to go but wont, then vtec comes and it pulls but no where near as much as it did,
Im using alot of oil but apparently thats normal,

Any help would be greatful before I get rid

thanks in advance

holmesnmanny

Check for codes first

accordturb96

what do you mean by using alot of oil??

GhostAccord

when were your valves adjusted last?

Using oil, as in burning it or leaking it? Ether way, it's not normal and should be looked into! Could be the basis for your issue.

marky2014

Thanks for the reply iv owned the car for about 3 months and used nearly 10litres of oil, valves I dont know as I havent done it but was actually looking into that last night going to do the valves on wednesday just need the clearances google should help on that haha, the car has service history up to 108 thousand but then hardly driven but iv serviced it twice as I like to look after my cars, I was looking for a hose blockage but nothing has turnt up some one said maybe clutch slipping but surely that would really slip in vtec? I used to be able to out run the clio sport 172 and 182 but now struggle keeping up

marky2014

And burning oil not leaking after vtec in 3rd you really smell and see the oil leaving my rear covering cars lol

marky2014

Havent checked for codes yet as I have the obd1 blue plug I need to get the converter

accordturb96

sounds like your rings are shot. The blue plug is a service port, you jump it with a paperclip and it allows you to check timing with a timing light. The port you need is either under the steering wheel or near the cig lighter

marky2014

hi iv had a compression test and its dead on, I dont have a port under steering wheel or under or near my cig lighter. I only have to blue plugs on passenger side, iv gone threw old paper work today from previous owner a d he fitted 1.6 civic ht leads so im going to change them, took a mechanic friend out in it and im losing clutch fluid so he reckons its spraying on my clutch so im gunna buy a new clutch kit (accord type r) and new ht leads and get my ecu read see what happens hopefully find the problem

NerfGunner420

dude please sell this car. sounds like you don't know what you are doing. leaking clutch fluid on the clutch? where is the leak?? compression test spot on? please the way you are working on your car don't tell us its spot on. give us the numbers and well be the judge of that. the previous owner fitted 1.6 civic "ht leads"???? wtf is that. "slap on the face" a accord type-r clutch? lmao for what? you running more then 140hp? if not then you are just throwing away your money at "placebo affects".

1.tune up, spark plugs. wires, cap, rotor, check coil for resistance/replace, fuel filter, o2 sensor check resistance/replace.
2.tire pressure. fresh oil. hope you are not just topping it off and and not changing oil. oil filter. don't use synthetic.
3.the burning oil is robbing you power. and i have never seen valve stem seals leak that much that you burn oil at vtec and high speeds.

accordturb96

marky2014

ok so iv had the car read today, iv got a few codes so here goes,

po500 vss malfunction
p0325 knock sensor 1 circuit bank 1
p1166 a/f sensor heater circuit
p1167 a/f sensor heater system fault
p0141 secondary ho2s sensor 2 heater circuit
p0443 evap system purge control valve circuit

im looking for a new knock sensor know, i assume i only have one, and its near the oil filter i think, but other faults havent looked into them at all as havent had time but will tomorrow any advise on these is greatful thanks

accordturb96

there is no knock sensor near the oil filter. Above the filter is the oil pressure switch.

marky2014

glad i asked on here first then, must of been reading a different accord info? do you know where abouts it is before i start pulling things apart?

accordturb96

nvm you're right I was thinking 94-97 accords. The knock sensor is next to and above the oil filter

marky2014

ok, ill find it one way or another just been googling the other codes as im not much of a Honda person (1st one), normally deal with vw or ford lol.

hopefully I can get these done within a week!!

whether I do or not is a different story

MAD_MIKE

Verify your wire harness is not damaged.
Verify your exhaust is not damaged.

Could be a common issue setting all these codes without there actually being a problem with all these items.

Check your engine and body grounds are clean and tight.

marky2014

Hi I had to do some work on the car yesterday, check wiring with condition and a 12v reader and there giving me readings the exhaust system will come with the faults due to me not having a catalytic converter on it, the knock sensor has a good reading via the harness so does the vss, the evap sensor is fucked had a look at it yesterday got to order one, the knock and vss are the most important at the moment so they will be done first, thanks for your advise as some people would check the wiring

I'm trying to find a manifold and downpipe and a sports cat but proven difficult, but i'm still hunting powerflow may come in use soon

MAD_MIKE

Even if you run without a catalyst the only code you should be getting would be P0420 for catalyst below threshold efficiency. Not that the O2s are faulty.
Primary is for A/F ratio
Secondary is for Catalyst functionality.
If you are getting a code for the O2S's then there is a problem with the O2s, the harness, or a connection.

marky2014

oh ok thanks for the info helped actually, i wasn't going to replace it but i think i will now, im doing the knock sensor today with a few other bits, im going to take my sensors out in the exhaust and clean them, I have realised that im missing my sensor that goes into the downpipe so need that replaced aswell

marky2014

Just one quick questions, i have know fixed the knock sensor, what a awkward place to put it, will the ecu know that it is fixed or will i have to delete the code?

GhostAccord

Always best to reset the ECU after switching out any sensors!

marky2014

I took the neg and pos of the battery to reset it, But going to get the diagnostics on it again once iv done a few more sensors,

My smoking has calmed down alot since i replaced the knock sensor but the car is still a bit laggy at 3000 rpm until vtec and I just don't know why, going to adjust valves next week

MAD_MIKE

On the timing belt side, check that the nut(#24) sticking outside of the timing belt covers is not loose.
If this were to loosen up the belt would gain slack and retard cam timing which would cause a lag in power output as ignition timing would also be retarded.

marky2014

Hi thanks for the info ill check that out just after xmas day, i done the valves onlt cylinder 3 and 4 where a little loose not much, but iv given up now with the car im getting a van in feb time and taking this of the road and turning it into a track car with a h22 block with forged pistons etc and a few surprises along the way