90 240 KA24E need help random problem

[240ight]

Hi peeps. Ok so here is the story. I hope you guys can help me. Car had been running fine but had engine light on. Emmission/inspection are due so I checked codes and it was injector leak. I checked all injectors and seemed fine so I reset code did a tune up and drove it a few days to see if light would come back on. So far no codes after about 200 miles so I took it to get the emmissions done. It failed and ever since then it has had a weird problem. It runs rough and missfires but the problem is intermittent. It can run fine for a day or two and then it can run and sound like s*** for a day or two. and lately its been worse. I start the car and give it gas and runs fine and then bugs down and then picks back up. It almost acts as if i was giving it gas and releasing and hitting gas and releasing.

When it runs and sounds fine everything seems normal. When it boggs down car has a bad knock and does not pull like normal engine, sound reminds me of the old "bug" engines.

Any Ideas on where to start checking? I truly appriciate any and all tips and help.

[compactfean]

May lifter collapsing?

[Pro ViZion]

When you looked at your injectors did you check the o-rings. They could be leaky which could cause that problem.

You said you did a "tune up." What all did that consist of?

[compactfean]

When you looked at your injectors did you check the o-rings. They could be leaky which could cause that problem.

You said you did a "tune up." What all did that consist of?

Wouldn't that just cause the fuel to leak onto the motor and low fuel pressure? He's got a sohc which are top feed injectors.....or on the other oring. Just a vacuum leak?

[240ight]

Thanks for your reply. I actually took it to a mechanic to do the tune up. I did the oil change my self and changed the oil filter. The thing that gets me is how ramdom it runs. it is so intermittent.

[robt95240]

this is off of the injector path but mine did something similar to that n i changed injectors and messed with my entire fuel system n it never fixed it... BUT.. someone told me check the MAF sensor n clean it.. i just replaced mine n it fixed it completely have no idea why it threw an injector code on mine but sounds like it could be a similar problem... on a side note just in case on the off chance you don't know be sure not to use anything but MAF cleaner to clean it NOT carb/choke cleaner or brake cleaner...

[240ight]

Thank you for your input. It turned out to be injector one. I did clean the MAF sensor just to make sure tho. I took it in and it passed emmissions I can stop stressing a little bit now
Again, thanks to all of you who replied. It is much appriciated it.

[mastakilla08]

timing?