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Was cleaning the throttle body on a 1991 chevy lumina euro 3.1 engine and noticed some oil in the air cleaner duct, it wasn't in the throttle body or the air filter. Where could it have come from

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  • Cars & Trucks Master
  • 75,807 Answers

It comes from the PCV vent system and is normal.

Posted on Apr 21, 2017

  • Mike Wetzel
    Mike Wetzel Apr 21, 2017

    Thank you. I also got my ac working now with your answer about it. I gave you a helpful answer at the end of your answer. Wish I could do more for you

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SOURCE: High fuel consumption , even after changin plugs/filter/Eng.oil/cvt gear oil and cleaning the throtle

Checked brakes for possible wheel(s) dragging, as well as tire pressures up to max recommended pressure, and observe if tire wear unusual, signifying improper alignment? Any difference in engine oil grade used?

Posted on May 13, 2009

Molson02536
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SOURCE: what two coolant lines connect to the throttle body on a 3.1 multi port engine

There are no coolant lines connected to the throttle body, just the two fuel line. The high pressure side and low pressure side (Return line) and I believe the lines don't even connect to the throttle body on a multi port engine, the lines go to the fuel rails to the injectors.
Good luck

Posted on May 24, 2009

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SOURCE: OBD code P04001 Insufficient flow, I changed the

did you clean the EGR passages? take the valve back off. one hole will have exhaust, the other should have strong vacuum.ususally the passage gets plugged with carbon, from the valve to where it goes into the intake manifold. you may take a wire and carb cleaner to clean the passage.

Posted on Oct 20, 2009

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SOURCE: i need the firing order for a 1991 chevy lumina

1991 Chevrolet Lumina 3.1 liter V-6 VIN "T"

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Hope this help (remember rated this post).

Posted on May 14, 2010

  • 3 Answers

SOURCE: 96 Nissan Maxima continues to have engine light

I had a similar problem - took it into 'Nissan Professionals' and they changed everything you did as well, and had no luck. After 4 or 5 times working on it, they told me that it was a 'loose wire' that had to be re-soddered and then the problem was fixed. I don't know where the wire was, but they made it sound like it was in or around the fuse panel under the hood.
I hope this might shed some light on the problem.

Posted on Sep 14, 2010

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How to clean the throttle body on a 1999 cougar


u can spray throttle boby cleaner on the throttle plates if it is sticking closed but if u want to do a real good job of cleaning it take it off and do it

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Car goes great for awhile and then engine stalls when stopping , and is hard starting unless you leave key on for awhile to let fuel pump catch up.


This is not the fuel pump, this is an idle air control issue. Either the idle air control valve is gummed up or the throttle body interior is filthy or both, the fix is very cheap. Disconnect the air ducting between the air filter cleaner and the throttle body. Using WD40 spray and a cloth clean the throttle interior and throttle plate until like new. Pivot the throttle plate by applying pressure with your fingers and clean in as far as you can behind the throttle plate. Remove the idle air control (IAC) valve from the throttle body and clean the associated passageways and pintle valve. Make sure the electrical connectors to the IAC is clean and reassemble everything. You should notice an immediate improvement to engine performance from start up and no more engine stalls.

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My 1992 chevy lumina z34 dies when I come to a stop sign.


I'm pretty sure your car has an "Idle Air Control" and this may be bad or the connectors to it could be corroded.

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Vehicle is used for mail delivery. outside temps in the 90s. two&half hours into delivery the engine stalls periodically. after few cranks it starts. temp gauge & radiator ok. oil pressure gauge is...


Clean your Throttle body with throttle body cleaner or Deep Creep made by Seafoam. When the carbon and varnish build up in your throttle body get's hot, it gums up the IAC (Idle air control) valve which help moderate your engine's rpm to keep it from stalling.
If the IAC is stuck due to the gum of the carbon and varnish in your throttle body, you have stalling issues which you have described. Start with that and replace your air cleaner filter since your going to clean your throttle body.
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Failed emmissions test number 1 its supposed 58 i had 128 what should i do


clean all engine breathers, engine flush, then change oil and oil filter. this should help dramaticly

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How do you replace a fuel pump in a 1991 Chevy Lumina euro 3.1?


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How to replace a water pump on a 2003 yukon


Water Pump Replacement (4.8L, 5.3L and 6.0L Engines)
Removal Procedure
1. Drain the cooling system.
2. Loosen the air cleaner outlet duct clamps at these locations:
 Throttle body
 Mass Airflow/Intake Air Temperature (MAF/IAT) sensor
3. Remove the radiator inlet hose clip from the outlet duct.
4. Remove the air cleaner outlet duct.
5. If necessary, remove the engine sight shield.
6. Remove the radiator vent inlet hose from the radiator hose clips.
7. Reposition the inlet hose clamp at the water pump.
8. Remove the inlet hose from the water pump.
9. Remove the fan blade.
11. Reposition the outlet hose clamp at the water pump.
12. Remove the outlet hose from the water pump.
13. Reposition the surge tank outlet hose clamp at the water pump.
14. Remove the surge tank outlet hose from the water pump.
15. Reposition the heater inlet hose clamp at the water pump.
16. Remove the heater inlet hose from the water pump.
17. Remove the water pump bolts.
18. Remove the water pump and gaskets.
19. Discard the water pump gaskets
Installation Procedure Important: All gaskets surfaces are to be free of oil or other foreign material
during assembly.
1. Install the water pump and NEW gaskets
2. Install the water pump bolts.
3. Install the heater inlet hose to the water pump.
Zoom Sized for Print
Notice: Refer to Fastener Notice in Service and Precautions.
2.1. Tighten the bolts a first pass to 15 Nm (11 ft. lbs.).
2.2. Tighten the bolts a final pass to 30 Nm (22 ft. lbs.).
4. Position the heater inlet hose clamp at the water pump.
5. Install the surge tank outlet hose to the water pump.
6. Position the surge tank outlet hose clamp at the water pump.
7. Install the outlet hose to the water pump.
8. Position the outlet hose clamp at the water pump.
9. Install the accessory drive belt.
10. Install the fan blade.
11. Install the inlet hose to the water pump.
12. Position the inlet hose clamp at the water pump.
13. Install the engine vent inlet hose to the radiator hose clips.
14. If necessary, install the engine sight shield.
Important: Align the arrow at the throttle body end of the duct with the throttle
body attaching stud.
15. Install the air cleaner outlet duct
16. Install the radiator inlet hose clip to the outlet duct.
17. Tighten the air cleaner outlet duct clamps at these locations:
 Throttle body
 MAF/IAT sensor Tighten the clamps to 7 Nm (62 inch lbs.).
18. Fill the cooling system.

I hope this helps. The numbering is incorrect in the sequence but the instructions are correct.

Roy

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Chevy malibu displays engine power reduced


It's fuel related, check your fuel filter to see if it's clogged, let me know. Good luck, Jim

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Camry 1991- really sluggish and jerky


It's just going to take some time and simple cleaning. If there is an Auto Zone around your area, you can buy all the things needed to get the car running 100% again in no time at all for under $40.00. Here is a few things that I do when i get a new car with a few years under it's wheels. Buy a bottle of injector cleaner for the fuel injectors, like STP, a bottle of Marvel Mystery Oil to add to the engine oil, and two can's of Throttle body cleaner for the throttle body and follow the instructions on the can. Make sure it's throttle body cleaner. The Carburetor cleaner is to corrosive for the throttle body gasket. Once you have reached 3,000 miles, service the engine and have them replace the oil (5W-30) and filter and add another Marvel Mystery Oil. This will clean out all the carbon and sludge in the engine to free up the oil passage ways, replace the Air filter, and PVC valve every 30,000 miles or once a year. Cleaning out the throttle body and adding the fuel injector cleaner will also help the fuel system and have them replace the fuel filter every 30,000 miles or once a year to ensure there is no fuel restrictions in the fuel system. Once this has been done you will notice the engine runs like new and you may have to use the Marvel Mystery Oil and fuel injector cleaner every 6 months to keep the internal engine free from sludge and carbon. Good luck and keep me posted, be glad to help you keep the car running 100% for a long time. 

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1 Answer

How t0 ajust the ilde screw on chev lumina


There is no idle adjustment screw. Idle is controlled by the ECM (Engine Control Module.) It controls what is called the IAC (Idle Air Control) motor, located in the throttle body. The throttle body and the IAC motor pintle have a tendancy to develop carbon deposits from the PCV system.

In order to fix your problem, you'll need to wipe the carbon deposits from the throttle body. First, purchase a can of throttle body/air intake cleaner from your local auto parts store. Remove the air intake boot from the throttle body, exposing the throttle blade inside. Open the throttle and spray it and the throttle blade down liberally with the cleaner. I like to let it soak for a little while, re-spray, then wipe it all clean with a rag. Repeat if necessary until it's clean and clear of deposits. If it has never been cleaned before, you'll notice a lot of black 'soot' deposits in there. When it's clean, you'll notice that the throttle blade most likely moves better, without sticking.

Re-install the air intake boot and start it up. It will be a little hard-starting at first, as the engine needs to **** in all the rest of that cleaner and burn it off. It'll only happen this one time and once it burns off, the engine should idle normally. If it still appears to be a low idle, you may need to consider taking a closer look at the IAC motor.

I hope this helps! :)

Aug 26, 2009 | 1998 Chevrolet Lumina

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