engine runs like shit

[BadBoy]

I replaced the head gasket on my 1989 240sx and now the car runs like crap.The motor shake's and when you give gas nothing no matther how much gas i give it just runs' the same.Can anyone help me out on this if you read my other post you will find out that i have water in my oil also.

[BadBoy]

ttt

[Jeff240sx]

Ok man, you kinda gotta be more specific.  
"Now the car runs like crap.  The motor shakes and when you give it gas nothing no matter how much gas I give it it just runs the same."

Was it as soon as you changed the head gasket?  When you give it gas nothing what?  It runs how?
Please explain.  I might give it a better shot.
Thanks,
-Jeff

[BadBoy]

Yes it was right after i replaced the head gasket and the timing chain guide

And when i give gas the engine dose not incress in speed even when i open it full trotell the RPM seems to stay the same.

How do i explain how it runs well the engine shakes a little and i can here a soft tapping sound.I did compersion test the engine and it was ok i tested becouse i noticed water in the oil after running it when it was shake real bad but i think the water is comming from the timing cover where the water pump part go's to the engine dont know if it is sealing good there.

Any help will be great thanks.

[ca18guy]

You said you shaved the head in another post, maybe the head is uneven and that is how the oil and water mix together, also when you replaced the timing chain you probably knocked the timing off (i hope you watched to make sure it was at TDC <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=':p'> ) How do your spark plugs look are they all black or are they good? Maybe your head is cracked, the thing that throws me off is you have good compression, maybe it's the ECU. If i were you i would redo everything you did (sounds like alot of work but it would be better that way)

[drifterx]

it could be something simple
check the MAFS cuz when it dont detect sucking it will shut down the car... also check the vaccum lines off the intake

[Jeff240sx]

I would listen to ca18guy. &nbsp;I would redo everything you did before and recheck the timing. &nbsp;If you have a gun, you can do that yourself with out taking the engine apart. &nbsp;Why did you replace the head gasket anyway?
-Jeff

[BadBoy]

I replaced the head gasket becouse the car overheated and the head gasket blew
Is there anyway to test the ECU

[Jeff240sx]

Yeah, the check engine light. &nbsp;Did it come on at any time??

[ca18guy]

There is a write up on checking the ecu at www.240sx.org usually a ecu will flash #'s or beep depending on the type of car, anyway check the site under faq's

[BadBoy]

No the check engine light did not come on at any time.

[BadBoy]

I rechecked the timing and that is good now i have to hold the trotel half way open to get it to start but if i let it go the engine quite's and it still dose not rev when i give it more gas.

[drifterx]

clutch? i am not there so i cant tell...
if not going but giving gas then &nbsp;it would be the clutch... but since u said u ahve to give 1/2 gas to start then i dont know...
i wanna know... does it start if u dont give it gas? i mean does it start then die if u dont give it gas?

[BadBoy]

does it start if u dont give it gas? i mean does it start then die if u dont give it gas?


Yes it dose this thing is driving me crazy i checked the ECU code's and it say nothing is wrong(well the red light flashed 5 times and the green light flashed 5 times)on the 240sx.org web site they said that mean's nothhing wrong.

[BadBoy]

Would the engine run like crap if there was water in the oil would it have the problems that i am having.

Thanks

[BadBoy]

ttt

[gt7152b]

Like drifterx said, it is probably something simple that you hooked up wrong when putting things back together. Go over the assembly procedure again and double check things like spark plug order. Try keeping the engine running for a few minutes to see if it will throw a code. Also, replace your fuel filter first thing.

[Jeff240sx]

Hey, I dunno about Nissan's, but thinking about it, my friend's Cavalier poured water into the oil, and it was the knock sensor.
You might wanna check your knock sensor... i dunno how, but that was his problem, and was only like $22.
-Jeff

[BadBoy]

What is a knock sensor and where is it located anyone know anything about this.

Thanks

[Jeff240sx]

Umm.. I dunno too much about it, cuz I didn't change it. &nbsp;If &nbsp;you have the '91 + ka24De, and DOHC, then you have a knock sensor. &nbsp;
Get a manual to find out where it is. &nbsp;I think it is somewhere under the valve cover.
-Jeff

[BadBoy]

I have the 1989 ka24e engine in my car dose that mean i dont have one.

Thanks

[BadBoy]

Well today i pulled the timing cover off to check and see if it was leaking water and i am almost sure it was.

Can someone tell me if a am getting good compersion if my head gasket could be leaking water into the engine.

Also my timing chain dose not look so hot so i am going to replace it how do imake sure it is lined up right i see the dot on the spocket but did not see a mark on the old chain.

someone help please.
Thanks

[BadBoy]

I looked at the timing chain agian and noticed two links to be diffirent color from the rest. I am guessing that they are the marks on the chain.
Also if the marks was not lined up right would that make the engine run &nbsp;like crap or like my engine is running.

Thanks for the help everyone.

[BadBoy]

ttt

[BadBoy]

Well i put the timing cover back on lined the timing chain up put the cam up like the book say's.And now the car starts but i have to hold the trotle open then after a while the car die's or if i let the trotle go
There is no water in the oil any more i fixed that problem it was the timing cover.But i cant get the car to idel the timing is good is there anything that i am doing wrong.

[gt7152b]

Is your rpm at idle normal?

[BadBoy]

No the engine will not idel i have to hold the trotle open to get the engine to run and then the rpm is at 2000.

[gt7152b]

How can you know if the timing is good if you can't get it to idle? Isn't the timing spec'ed for idle speed?

[Jeff240sx]

Have someone check the IAA valve. &nbsp;It controls the air mixture during idle. &nbsp;It is about $120 from what I've heard, and the IAA valve is a common problem on older 240's. &nbsp;Look it up in your book for where it is, cuz I have a much different engine. &nbsp;You case of the IAA valve doesn't sound like it just started, but was a long time comming, and left unnoticed.
If it's not that, which is unlikely, try the electronics. &nbsp;Plugs, wires, and most importantly, rotor cap and ignition coil. &nbsp;
And my last, and probably most useless suggestion, is a vaccuum leak. &nbsp;To test for a leak, spray carb cleaner on your vaccuum hoses. &nbsp;If the engine revs up, you have a leak. &nbsp;Leaks usually cause slow RPMs or make the revs go sky high.
Once again... IAA valves are common problems. &nbsp;Check it.
-Jeff

[drifterx]

mine did that when the vaccuum lines off the intake were bent....
so check those