I have a 1991 Camaro rs with the 305 and I have.

Tiny
CAMROGUYRS91
  • 1991 CHEVROLET CAMARO
  • 151,000 MILES

I have a 1991 camaro rs with the 305 and I have replaced several parts thinking that they are the problems, such as TPS, ECM, distributor, wires, plugs, cap, rotor, rebuilt the tbi, and probably even more just cant think off the top of my head. The car wont spray the fuel in order to idle, I can keep the car running by pumping the throttle but I cant just lay my foot into it and have it increase rpm, it will just bog out and die but it will spray the fuel. I need this car on the road soon how can I fix this?

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Monday, November 5th, 2012 AT 6:31 AM

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Tiny
CJ MEDEVAC
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DID YOU SNATCH THIS OUT AND CLEAN IT AND THE HOLE IT WAS IN?

http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_idle-air-control-valve-bwd_5012678-p?searchTerm=iac

KEEP US POSTED

THE MEDIC

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Monday, November 5th, 2012 AT 6:36 AM
Tiny
CAMROGUYRS91
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Yes I did a little bit. Is that bad?

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Monday, November 5th, 2012 AT 4:18 PM
Tiny
CJ MEDEVAC
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NEGATIVE (WAS HOPIN' YOU HADN'T TRIED IT YET--AND THIS BE THE CURE!)---IF IT WERE ALL CARBON-ED UP (EVEN IN THE HOLE) AND YOU GOT IT ALL CLEAN

THIS MIGHTA BEEN YOUR PROBLEM......MAYBE YOU DIDN'T CLEAN IT ENOUGH?

IT ALSO MIGHT BE THAT THE PART IS BAD.......IF CLEANING IT WELL MAKES ANY IMPROVEMENT----YOU MIGHT THINK ABOUT REPLACING IT

PULL THE EGR AND GIVE IT A GOOD CLEANING TOO....CAN'T HURT

I AM NOT SAYING TO SPEND YOUR $$$ JUST TO "PARTS SWAP"

HERE'S MY EXPERIENCE WITH A FOR COUNTERPART

http://www.2carpros.com/questions/2006-ford-fiesta-engine

LET ME KNOW--BEFORE YOU BUY STUFF---I CAN MAYBE HELP YOU SAVE A LITTLE

THE MEDIC

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Tuesday, November 6th, 2012 AT 3:27 AM
Tiny
CAMROGUYRS91
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Okay I will do that and let you know. Where is the egr located?

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Tuesday, November 6th, 2012 AT 4:38 AM
Tiny
CJ MEDEVAC
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SEE IF YOU CAN FIND THIS ON YOUR ENGINE

http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_egr-valve-bwd_18480153-p?searchTerm=egr+valve

SHOULD JUST SORTA SMACK YOU IN THE FACE!

SOMETIMES CARBON IS SORTA GRAY IN COLOR AND MAY APPEAR TO BE PART OF THE ENGINE CASTINGMAKE SURE YOU CLEAN ALL THAT YOU CAN

THE MEDIC

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Tuesday, November 6th, 2012 AT 4:57 AM
Tiny
CAMROGUYRS91
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Alright I will find that and clean it up and then I will get back to you as soon as I do that. Thank-you!

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Tuesday, November 6th, 2012 AT 6:32 AM
Tiny
CAMROGUYRS91
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Okay, so I took both of those parts off and cleaned them. It helped a little bit but not much at all. It stil isnt close to idling. It is a little bette when you lay your footin it but it stll bogs out.

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Monday, November 12th, 2012 AT 10:04 PM
Tiny
CJ MEDEVAC
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I'LL SEE IF I CAN FIND ANOTHER EXPERT TO ASSIST

THE MEDIC

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Tuesday, November 13th, 2012 AT 3:29 AM
Tiny
CAMROGUYRS91
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Okay

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Tuesday, November 13th, 2012 AT 4:54 AM
Tiny
KHLOW2008
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At the throttle stop screw, place a piece of thin card board in between and test if the idling speed stabilises. If yes, you might need to adjust the throttle stop screw ( not advised nor required under normal circumstances).

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Tuesday, November 13th, 2012 AT 11:11 AM
Tiny
CAMROGUYRS91
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Okay I will try that but what about the bogging out whrn I try to slowly increase throttle?

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Tuesday, November 13th, 2012 AT 5:27 PM
Tiny
CJ MEDEVAC
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THIS IS SORTA AN EXPLANATION TO WHERE KHLow2008 IS GOING WITH THIS

I'M NOT THAT SKILLED AND EXPERIENCED. YET?

EVEN WITH A CARBURETOR, THE OPENING OF THE THROTTLE PLATE IS SORTA SYNCHRONIZED OR FITTED WITH PROPER SIZED GOODIES INSIDE SO THAT THEY "WORK TOGETHER" AS MORE AIR AND FUEL IS INTRODUCED IN

THIS IS VERY CRITICAL WITH A COMPUTER MAKING THE DECISIONS MANY TIMES A SECOND AS TO HOW MUCH FUEL TO INJECT AND OTHER TASKS IT MUST PERFORM

IT GETS INFO BUILT WITHIN---AND "REAL WORLD" INFO THAT YOUR CARS SENSORS PROVIDE

IF SOMETHING AIN'T RIGHT IT REVERTS/ DEFAULTS BACK INTO A STATE KNOWN AS "CLOSED LOOP" IN ORDER TO CONTINUE TO RUN. THIS MODE IS NOT EFFICIENT. AS IT IS RUNNING BASICALLY ONLY ON FACTORY SETTINGS

"OPEN LOOP" IS WHERE THE CAR IS RUNNING ON INFO COLLECTED BY THE SENSORS, WHICH ARE PICKING UP CONSTANTLY CHANGING DATA IN THE "MODE AND ENVIRONMENT" YOUR CAR IS "PRESENTLY IN". THIS IS HOW YOU GET GREAT PERFORMANCE AND EFFICIENCY WITH YOUR FUEL. FOR INSTANCE: 55 MPH IN THE THIN AIR AT DENVER COLORADO. THEN YOU FLOOR IT!----THEN YOU TRAVEL TO FLORIDA THE NEXT DAY----THE FACTORS CHANGE!

NOW SORTA MORE ON WHAT Y'ALL ARE PRESENTLY DISCUSSIN'

THE OLE THROTTLE SCREW IS NORMALLY USED ON A COMPUTER OPERATED CAR TO SET "BASE IDLE"

THIS BASE IDLE IS SORTA THE "ZERO" IN WHICH THE COMPUTER RECOGNIZES THE POSITION OF THE THROTTLE PLATE (IT KNOWS WHERE, BECAUSE THE TPS [THROTTLE POSITION SENSOR] SORTA TELLS IT!

THE WHOLE SYSTEM SORTA DEPENDS ON WHERE "THIS IS. AT THAT TIME. WHEN THE OTHER IS HAPPENING"----MANY THINGS ARE DEPENDING ON WHAT THE OTHER ONE DOES

AS THE THROTTLE GETS OPENED--AIR ENTERS AT EXPONENTIAL RATESTHE COMPUTER MUST KNOW HOW MUCH, AS YOU STEP ON THE GAS---OR LET OFF

INDISCRIMINATELY MESSING WITH ADJUSTMENTS WITHOUT METERS AND PROPER TOOLS OR SOME EXPERT SORTA GUIDANCE WILL THROW THINGS INTO HELTER SKELTER. THE COMPUTER TURNS EVIL AND IS NO LONGER YOUR FRIEND!

JUST A STUPID IF: NOW YOUR CAR THINKS YOU ARE IN FLORIDA CLIMBING A 20,000 FT PEAK WITH THE THROTTLE WIDE OPENWHEN IN REALITY YOU ARE DOIN' 30 IN THE MIDDLE OF A SMALL KANSAS TOWN

STAY WITH KHLow2008, HE'LL GET YOU STRAIGHT. IS THIS CLOSE TO RIGHT KHLow2008?

THE MEDIC

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Tuesday, November 13th, 2012 AT 6:11 PM
Tiny
SATURNTECH9
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If that card board trick works I wouldnt adjust that screw I would suspect the idle air control valve not opening enough to let it idle correctly. Thats where I would start.

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Tuesday, November 13th, 2012 AT 6:55 PM
Tiny
CAMROGUYRS91
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Okay, I will give this a shot and let you know. That was very good info by the way.

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Tuesday, November 13th, 2012 AT 8:15 PM
Tiny
SATURNTECH9
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Your welcome have you done a fuel pressure test yet?

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Tuesday, November 13th, 2012 AT 8:39 PM
Tiny
CAMROGUYRS91
  • MEMBER

I just put a brand new pump in it.

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Wednesday, November 14th, 2012 AT 12:37 AM
Tiny
KHLOW2008
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CJ, hopefully we are close to the source.

Camroguyrs91, when idling is not stable due to the throttle opening, it can affect the TPS performance and this can result in hesitation.

Did you test the TPS voltage at closed throttle?

Saturntech9, thanks for filling in the blanks. We seems to have a rapport to be able to understand what each of us is thinking, lol.

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Wednesday, November 14th, 2012 AT 12:57 AM
Tiny
CAMROGUYRS91
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Okay so I tried the thin cardboard trick and that did not do anything at all. I have not checked the voltage for the TPS. What should it be and how should I go about it?

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Wednesday, November 14th, 2012 AT 1:00 AM
Tiny
KHLOW2008
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Try the following and refer to chart for the correct reading.

V6 THROTTLE POSITION SENSOR

NOTE:
Not all TPS are adjustable.

Throttle Position Sensor (TPS) can be adjusted using "Scan" tester or the following
procedure.

1) Ensure engine is at normal operating temperature. Install 3 jumper wires between
TPS and TPS wiring harness connector.

2) Turn ignition on with engine off. Connect a DVOM to Dark Blue and Black wire
terminals. With throttle at closed position, adjust TPS to obtain specified voltage. See
TPS ADJUSTMENT VOLTAGE table.

3) Tighten screws and recheck readings. Turn ignition off. Remove jumper wires and
reconnect harness connector to TPS.

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Wednesday, November 14th, 2012 AT 1:28 AM
Tiny
CAMROGUYRS91
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Is it the same for a v8?

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Wednesday, November 14th, 2012 AT 2:15 AM

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