V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

Injector problems?

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Old Jun 14, 2010 | 05:19 PM
  #1  
M20's Avatar
M20
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From: Central Missouri
Car: 1989 Firebird
Engine: 2.8
Injector problems?

Ok, I am helping a buddy of mine fix an 89 camaro with a 2.8 he just bought. The guy he bought it from said they were driving it home and the fuel pump went out on it. we replaced the fuel pump. nothing happened. a local GM tech said it was the computer or maf air flow sensor. Replaced both still wont run. Thirs mechanic that looked at it says it is an injector isnt working. we took the plenum off and check the injectors. Sure enough one isnt clicking when given electric. The car will start and run for a minute or two then boggs down and dies then it wont start again. Could it be the injector only or is the another problem?
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Old Jun 14, 2010 | 06:26 PM
  #2  
Maverick H1L's Avatar
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From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
Re: Injector problems?

We need more info:
1. Is the car throwing any codes? Put a paper clip or other piece of wire in the 2 holes in the upper right hand corner of the 12-pin connector just to the left of the radio and ventilation controls that faces the driver.
2. Remove the spark plugs and lay them out as they were removed. What color is each plug?

Also, the mechanic may have been WAY off. The ignition modules on these cars like to go out without any reason whenever they want to, which is why several people I know, and I recommend, carry a spare or 2 in the car just in case the one on the engine fails. If the module fails, the ECM won't know the engine is turning over and trying to run, so nothing will happen because the ECM won't fire off the injectors (and the module also provides base spark until the engine reaches 400 RPM, so you won't have spark, either).

I worked on a car that was towed into the shop because it died on the highway due to a bad ignition module, FYI.
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Old Jun 14, 2010 | 09:31 PM
  #3  
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M20
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From: Central Missouri
Car: 1989 Firebird
Engine: 2.8
Re: Injector problems?

the car is throwing code 32 or 34 I cant remember. The car will start and run but not everytime you hit the key.
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Old Jun 15, 2010 | 07:55 AM
  #4  
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From: Rockville Centre, NY
Re: Injector problems?

for the heck of it, check the ohms on your injectors also the multecs are
extremely problematic
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Old Jun 15, 2010 | 10:22 AM
  #5  
Maverick H1L's Avatar
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From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
Re: Injector problems?

If the car is still throwing a code 34, did you also check the relay, or have it checked? The easiest way to do this is to swap it with one of the other relays by the brake booster. Also, did you replace the MAF with an aftermarket? If so, take it off and look at the orange film inside from the engine side of the MAF. If it's not flat, take it back. Get your money back and see if you can't find a GM MAF on eBay (where I got mine after killing 2 new aftermarket MAFs in about 3 years).

A code 32 could mean that the EGR solenoid is malfunctioning. It either won't open, or it's stuck open and causing a big vacuum leak, which is why the engine won't start.

Still need to know about the spark plugs and if the ignition module has been tested. Or, just remove one plug and check for spark.
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Old Jun 15, 2010 | 09:35 PM
  #6  
M20's Avatar
M20
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From: Central Missouri
Car: 1989 Firebird
Engine: 2.8
Re: Injector problems?

What kinda ohms am I looking for on the injectors? I am not sure what kind he got for the maf. what is the ignition module and roughly how much do they cost?
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Old Jun 15, 2010 | 10:17 PM
  #7  
Maverick H1L's Avatar
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From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
Re: Injector problems?

Originally Posted by M20
What kinda ohms am I looking for on the injectors? I am not sure what kind he got for the maf. what is the ignition module and roughly how much do they cost?
1. No less than 11.4 ohms or the injector being tested needs to be tossed.
2. Ignition module is the thing in the dizzy that the engine harness connects to, having a 2-wire and a 4-wire connector at the base of the cap. Cheapies are about $40, but I'd look for an AC/Delco one as they last longer. Read what I said in my first post above about what the module is and what it does, exactly. And, like I also said above, pull a plug and look for a nice white spark. "No spark, no squirt!"
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