Question about 1987 Chevrolet Camaro

1 Answer

My Iroc is an 88, 305 TPI. Starts fine. Idles

My Iroc is an 88, 305 TPI. Starts fine. Idles good. If you take off slow and accelerate slow, it runs okay. But if you get on a hill or step down on the throttle to accelerate faster, it loses power, cuts out, the service light comes on. You may also get a fuel flooding type smell. The code reader says it is the MAF. It has now been through 3 new MAFS. All are from auto parts chains. The first MAF was without a screen and it was a fin type. The next two were screened with heated wires. Evidently the wires got burned out on them. A GM dealers service department that the car is now at diagnost the circuits to the MAF and did not find any faults or shorts. They now tell me that the car requires a MAF that would cost $800 or more. That is more than twice the price of the previous MAFs. Once the MAF is in, it is mine whether it works or not. A costly experiment. Do you have any other ideas? Could differences in these after market MAFs really be that prominent?

Posted by on

  • yadayada
    yadayada May 11, 2010

    try our premium support

×

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 95 Answers

Inspecting your other problems first:(as yo replaced you MAF)

Take a real good look at the throttle "butterfly" valve. They have a tendency to get buildup with dirt and will stick slightly open, confusing the computer into thinking that you are pushing on the "go" pedal. Get some carb cleaner, or even better, GM Top Engine cleaner, and really clean out the throttle valve and air intake area. I have seen several similar problems fixed this way. If this does not take care of it, it may be worth paying someone an hours labor to hook up a good scanner and see what is going on. You can waste a lot of money on the newer cars throwing a lot of expensive parts at them and still not fixing the problem. It could be a simple loose connection somewhere. A good tech can catch this type of stuff with a good scan tool.
Always check the fuel pressure .
It might be the in tank fuel pump or clogged filter

checking that can be done by you easily:
you might check the ground wires that are located at various places on the engine
check your IAC valve (idle air control), this is located on the passenger side underneath the throttle body. These get all carboned up and can't re-seat themselves properly. You may have to perform a minimum idle setting also. This isn't to hard but is more complicated than on a non-computer controlled

MAF signal checking:

I used a small straigt pin and shoved it in the back side of the MAF connector on the signal line. I started the motor and expected to see the voltage signal to start low at idle and increase smoothly with engine speed. Instead what I saw was a stead 5 volts meaning the ECU had supplied the bias signal but the MAF wasn't loading it down to generate the signal. The issue was that the MAF socket pins in the connector were slightly sprung and had a thin layer of oxidation on them. I tiny rolled up piece of sand paper buffed the terminals up. A tiny pick probe was used to squeeze the socket pins closed slightly. A light doping of dielectric grease kept the moisture out and it's been running fine for 5 or so years no

Hope this helps,kindly RATE ME

Posted on Jun 17, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

95 Isuzu pickup won't accelerate at all, it bogs and dies, What could it be?


sounds like a crank sensor problem, or cheap fuel and engine in "get home mode"

Nov 12, 2013 | 2005 Scion tC

1 Answer

94 tempo hesitates on acceleration


couple of things to check is fuel pressure,tps(throttle position sensor),see if the egr is opening too soon.you may have to check the exhaust backpressure to see if it has a plugged exhuast system.

Apr 19, 2012 | Ford Cars & Trucks

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

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

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.


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.

Feb 08, 2010 | 1985 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

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

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

79 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6918 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...