Can any one help please.:thankyou:

[sold my soul]

OK i have a 94 mtx i have let it sit for a month and i have been letting it run a couple times in the last couple of days it idles fine when i leave it aloan but when i drive it i have to keep the rpms up or it will die, but when i just got back from my little drive a couple minutes ago the rpms were wavey between half a rpm to 1 rpm and the oil light was dimming in and out. if any one has any advise that would be great.

 

[Kens1992mtxSHO]

Stop driving it NOW....

Change your rod bearings ASAP or you'll be replacing your engine instead.

 

[sold my soul]

thanks

than you for that i was thinking it had to do somthing with the fuel system but i will look in to the rod bearings.

 

[frosho]

It sounds like the pressure light is only coming on when the engine falls below idle speed, which is normal. If the red light comes on around idle or higher, then yes you may have worn bearings.

First thing to do is check the computer for stored trouble codes using this procedure- http://www.shophoenixproject.com/eec/eec.htm.

It could be something as simple as resetting the idle. Try searching the forum for "idle reset procedure" or something like that.

 

[yamahaSHO]

Stop driving it NOW....

Change your rod bearings ASAP or you'll be replacing your engine instead.

....Except, that doesn't seem like the problem. His problem is it doesn't drive well and now the idle is dropping low enough to cause low oil pressure.

I'd start with what frosho said.

 

[sold my soul]

thank you

i was driving it earlier and um ya it still has the power i can still burn the tiers going from first to seconed.

 

[sold my soul]

ok guys

ok guys this is what i pulled up code 211 ignition pip signal was erratic or missing, 519 psp switch/circut open, 542 fuel pump open, bad ground or always on-- power/fuel pump circuits, 551 problem in intake manifold runner control solenoid/circuit. Any help would be great.

 

[frosho]

That 551 code makes me wonder if your secondary intake runners are stuck open. They're supposed to be closed under ~4000 RPM. If not, there won't be much low end torque and the drivability might suffer. I'd check them out.

 

[sold my soul]

thanks

the before i start tearing the top end off, the secondaries are the butterflys right?

 

[Kens1992mtxSHO]

Yes...

 

[Kens1992mtxSHO]

The 211 code could mean your crank sensor is about to crap out on you. Could also be DIS related.

 

[sold my soul]

it makes me wounder if it is because i have the bord out butterflies do you guys think that could be it

 

[Kens1992mtxSHO]

Did you reuse the stock butterfly plate? I would check your secondary connection. It's easy to get it mixed up or forget a vacuum hose. When you unplug them while the car is running they should open.

 

[sold my soul]

not the stock ones but they were off another 94 mtx

 

[Kens1992mtxSHO]

I don't think using the stock butterfly plates will cause this problem but it might not be helping. Try the idle relearn procedure.

 

[sold my soul]

how is that?

 

[Kens1992mtxSHO]

Additional air is weeping past the butterflies if the stock plate is being used because the airway is not sealed as well as it would be with the bigger plates. Your car has learned how to idle with the previous amount of air going into the engine. Now, there is more and hasn't quite learned how to handle it.

This could easily be fixed with an idle relearn, clean MAF, and fix butterflies if they're stuck open. *IF* either one of those is the culprit.

Also try removing the MAF and see if it idles better. If it does you need a new MAF

 

[sold my soul]

ok thanks i will get started on that tomarrow and i will let you guys know how it went.

 

[93rev2sev]

the air getting past the butterflies has already been metered, so I doubt that's the problem. This sounds like a vacuum leak or a loose intake hose clamp or a faulty Idle Air Bypass. Can you get us a picture of the intake side of the engine compartment?

 

[sold my soul]

how do you add pics