Question about 1985 Chevrolet Camaro

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1985 iroc tpi 305 can the fuel pressure be adjusted! i bought it used and it runs good but backfires and the exaust smells badly of gas has a new o2 and map sensor on it.

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If it is fuel injected,the fuel pressure regulator is most likely the problem,if it is carbureted the mc solenoid could be the problem,or carburetor needs rebuilding.

Posted on Feb 08, 2010

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1987 CHEVY IROC Z28 350 TPI- RUNNING RICH, LOTS OF CARBON BUILT UP ON THE INTAKE, BAD FUEL MILAGE


I'd be looking for a few things there. First, make sure that the temperature sender is working. If not, the computer thinks the engine is always cold so it sends more fuel even though it's not needed. Next, make sure that there aren't any exhaust leaks ahead of the O2 sensor. That will cause the sensor to think that the actual mixture is lean, again asking for more fuel. Also check that the O2 sensor is good. Out of range can do the same thing. There are other more complicated causes but those are the most common.

Jul 19, 2011 | 1987 Chevrolet Camaro

1 Answer

I have a 1988 iroc 305 tpi 5spd car runs fine till it gets hot. I have replaced pulgs,fuel pump,fuel filter,cap,rotor,wires,3 sensors.


might wanna check the fuel injectors when the start going bad they get a high resistance at engine normal temp

Jun 15, 2011 | 1988 Chevrolet Camaro

1 Answer

1985 iroc started this morning then stalled and will not start...... checked for fuel OK checked spark OK cranks but still will not start. Car is 305 TPI Auto


maybe check the battery, check all wired that source of electricity, and check starter assembly if its working, or go to your nearest service center and ask the mechanic for assistance











rate me please thanks.....

Jun 05, 2011 | Chevrolet Camaro Cars & Trucks

1 Answer

87 IROC WITH A ZZ4 OUT OF A 91 Z28... fitted a


Fuel pressure? Do you hear the fuel pump running? Read the codes to see if ECM is still alive. Do you have spark at the plugs? Remember all motors need 3 things to run air, fuel, and fire at the right time.

Mar 16, 2010 | 1987 Chevrolet Camaro

1 Answer

87 Iroc (305 TPI) runs rough, lopes and lacks...


SOUNDS LIKE A VACUM LEAK,POSSIBLY INTAKE GASKET OR VACUM HOSES,GET SOME BERKIBLE 2+2 SPRAY DOWN INTAKES WHERE MEET HEAD AROND THROTTLE BODY AND ALSO EGR VALVE TO MAKE SURE IT ISN'T PARTAILY STUCK OPEN, VACUM LINES AIR INTAKE HOSE BETWEEN THROTTLE BODY AND AIR FLOW METER,ALSO MAKE SURE ITS NOT DRY ROTTED AND SUCKING AIR,THE ENGINE IDLE SHOULD GO UP OR DOWN DEPENDING HOW BIG THE LEAK

May 17, 2009 | 1987 Chevrolet Camaro

1 Answer

Iroc z needs help


have you checked the fuses?

Jul 21, 2008 | 1990 Chevrolet Camaro

1 Answer

1988 iroc-z 350 tpi - runs poorly when hot (190-200degrees)


Does it run poor at full throttle or between quarter and half throttle? Does it hessitate? If it does the EGR valve may be worn out. I had an 87 transam with TPI and was having problems with it stumbling and hesitating when it was warmed up. If the car starts hard and you have these problems then the issue may be low fuel pressure. Hook a guage up to the fuel rail and make sure you are getting pressure. If you are only getting a few pounds of pressure it may be the fuel pump or fuel pressure regulator. Good luck and if you thought this information was helpful please rate it when you get a chance.

Thanks - Tech101

Jun 08, 2008 | 1988 Chevrolet Camaro

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