84 fuel injectors
Thread Starter
Burning Brakes
Joined: Jul 2013
Posts: 1,027
Likes: 30
From: Granite City Illinois
84 fuel injectors
The engine seems to be running rough theres a little vibratiion in the steering wheel, it sems to have a little less power and fuel economy basically sucks.
I havent had the car very long.
The plugs were replaced a month ago,a new 02 sensor was just put in,and a new air filter.
Theres no vss signal its messed up and disconnected until thats taken care of.
So, I tried pulling a plug wire and didnt notice any difference. Tried a different one same thing.
Thought maybe its an injector (cross fire, one `front` and one `rear` injector some people tell me thy call them squirters instead of injectors) .
Took a look and the front one isnt spraying quite as fine as the other, gets a little better on revving but not right still.
But it really looks like a ton of gas is spraying out and I dont remember hearing any clicking.
Where do I start? I guess I should try to read the codes the check engine light does come on when Im driving but not if I start it and let it idle.
I havent had the car very long.
The plugs were replaced a month ago,a new 02 sensor was just put in,and a new air filter.
Theres no vss signal its messed up and disconnected until thats taken care of.
So, I tried pulling a plug wire and didnt notice any difference. Tried a different one same thing.
Thought maybe its an injector (cross fire, one `front` and one `rear` injector some people tell me thy call them squirters instead of injectors) .
Took a look and the front one isnt spraying quite as fine as the other, gets a little better on revving but not right still.
But it really looks like a ton of gas is spraying out and I dont remember hearing any clicking.
Where do I start? I guess I should try to read the codes the check engine light does come on when Im driving but not if I start it and let it idle.
Thread Starter
Burning Brakes
Joined: Jul 2013
Posts: 1,027
Likes: 30
From: Granite City Illinois
Ok I tried reading codes and all I get is 1 2 1 2 1 2 over and over again.I know there has to have been some codes why isnt it reporting them? Something wrong with the computer not saving them?
Advanced
Joined: Aug 2007
Posts: 62
Likes: 0
Pull a spark plug or two and see if the motor is running rich. If it is the plugs will be carbon-ed up and look black. I'm thinking that maybe after changing the O2 sensor, there is an air leak into the exhaust.
But, I do know that on my crossfire, it does look like a ton of gasoline is going into the throttle bodies. Mine is running well, though. It's hard to tell how bad the spray pattern is from my chair, though. You may want to add some fuel injector cleaner to your gas tank, but then you may need to be replacing your fuel filter shortly thereafter.
But, I do know that on my crossfire, it does look like a ton of gasoline is going into the throttle bodies. Mine is running well, though. It's hard to tell how bad the spray pattern is from my chair, though. You may want to add some fuel injector cleaner to your gas tank, but then you may need to be replacing your fuel filter shortly thereafter.
Thread Starter
Burning Brakes
Joined: Jul 2013
Posts: 1,027
Likes: 30
From: Granite City Illinois
Pull a spark plug or two and see if the motor is running rich. If it is the plugs will be carbon-ed up and look black. I'm thinking that maybe after changing the O2 sensor, there is an air leak into the exhaust.
But, I do know that on my crossfire, it does look like a ton of gasoline is going into the throttle bodies. Mine is running well, though. It's hard to tell how bad the spray pattern is from my chair, though. You may want to add some fuel injector cleaner to your gas tank, but then you may need to be replacing your fuel filter shortly thereafter.
But, I do know that on my crossfire, it does look like a ton of gasoline is going into the throttle bodies. Mine is running well, though. It's hard to tell how bad the spray pattern is from my chair, though. You may want to add some fuel injector cleaner to your gas tank, but then you may need to be replacing your fuel filter shortly thereafter.
One injector appears to be spraying rather than misting when at idle speed and mist more when the engine is revved up. Maybe thats why I notice it when Im taking off from a stop most.
Last edited by ToniJ1960; Nov 20, 2013 at 05:55 PM. Reason: typo
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Thread Starter
Burning Brakes
Joined: Jul 2013
Posts: 1,027
Likes: 30
From: Granite City Illinois
I had it changed at an exhaust shop and they do pretty good work, but they did say there were some places in the exhaust that should be welded because theyre just crimped.
Is there anything that shouldf be done after an O2 sensor is replaced like take off a battery wire and put it back on to reset something?
I dont have a fuel pressure tester or have any idea how to hook it up to the car. I guess I could get it done somewhere would it cost a lot to test?
Should I test the pressure regulator? I read a few places theres a vacuum hose to pull off and see if theres gas in it. Is there just one regulator for both sides?
I really need a diagram of the system. For everyone else it seems so simple. I need an overview.
Wheres a good place to get an 84 injector at a good price? Is there any chance I can find someone in St Louis to rebuild these?
Also Im getting a small puff of black smoke when I start the car after it sits overnight. The air filter is new now.
Last edited by ToniJ1960; Nov 21, 2013 at 12:21 AM.
Safety Car
Joined: Sep 2004
Posts: 3,953
Likes: 550
From: Mission Viejo CA
That's a really nice feature of the cross-fire injection! You can actually watch your injectors work! Try that on a tuned port!
Both injectors should have the same spray pattern. If they're not the same, you sure won't have the correct fuel flow into all eight cylinders. Then the O2 sensor will go crazy!
These injectors don't "click". They spray a varying amount of fuel, depending on the engine requirements and the computer signal. If one injector is weak, the other will try to make up for the insufficient flow from the weak injector, which fouls up everything.
Both injectors should have the same spray pattern. If they're not the same, you sure won't have the correct fuel flow into all eight cylinders. Then the O2 sensor will go crazy!
These injectors don't "click". They spray a varying amount of fuel, depending on the engine requirements and the computer signal. If one injector is weak, the other will try to make up for the insufficient flow from the weak injector, which fouls up everything.
Thread Starter
Burning Brakes
Joined: Jul 2013
Posts: 1,027
Likes: 30
From: Granite City Illinois
That's a really nice feature of the cross-fire injection! You can actually watch your injectors work! Try that on a tuned port!
Both injectors should have the same spray pattern. If they're not the same, you sure won't have the correct fuel flow into all eight cylinders. Then the O2 sensor will go crazy!
These injectors don't "click". They spray a varying amount of fuel, depending on the engine requirements and the computer signal. If one injector is weak, the other will try to make up for the insufficient flow from the weak injector, which fouls up everything.
Both injectors should have the same spray pattern. If they're not the same, you sure won't have the correct fuel flow into all eight cylinders. Then the O2 sensor will go crazy!
These injectors don't "click". They spray a varying amount of fuel, depending on the engine requirements and the computer signal. If one injector is weak, the other will try to make up for the insufficient flow from the weak injector, which fouls up everything.
Like I said in the other one though Im wondering if the injector not misting right could keep all the cylinders on one side from firing right and thats why taking off two wires on that side didnt change the idle?
Safety Car
Joined: Sep 2004
Posts: 3,953
Likes: 550
From: Mission Viejo CA
The engine would probably run more smoothly if you disconnected one fuel injector and stuffed a rag in that injector to block the air flow! I haven't tried this, but at least you'd have a uniform fuel mixture! It wouldn't idle too good, because you wouldn't have enough air flow. (If you try this, don't let the engine swallow the rag!)
Cross-Fire engines have frequent problems with vacuum leaks. Try tightening the 16 (or so) bolts around the periphery of the intake manifold.