90 Corvette Hesitation and Missing
Burning Brakes
Joined: Oct 2004
Posts: 898
Likes: 1
From: Pearland Texas
Sorry my bad, the only way is to replace all eight. You'll get tons of advice when it come time to start. Its a little time consuming but if you label bolts and take your time, it will go back together faster.
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Joined: Apr 2007
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From: Montgomery Alabama
It doesn't sound too bad. I'll check them tomorrow and if so I'm going to order a set of the BIIIs.
Racer
Joined: Oct 2001
Posts: 311
Likes: 2
From: Roseburg OR
My guess is it might be the O2 sensor when it goes into closed loop operation. On my 90 I found the wire had worn thru by rubbing and was shorting out, replace O2 sensor and wire.
Replace the stock Multecs also, mine failed and ruined the cats.
Replace the stock Multecs also, mine failed and ruined the cats.
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Joined: Apr 2007
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From: Montgomery Alabama
UPDATE: I checked my injectors today and all are 17 but one is 14 and the other i cant get a steady reading until it says 3, but i doubt that's possible.
Supporting Vendor
Joined: Mar 2008
Posts: 1,762
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From: Cumming Ga
that is very possible.. try to get a good reading, but a shorted on can read 2 or 3 very easily, if it is there is your problem
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From: Montgomery Alabama
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Joined: Apr 2007
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From: Montgomery Alabama
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Joined: Mar 2008
Posts: 1,762
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From: Cumming Ga
that is because its shorted, I think its time for injectors
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Supporting Vendor
Joined: Mar 2008
Posts: 1,762
Likes: 14
From: Cumming Ga
here ya go, thank you
http://fuelinjectorconnection.com/sh...&productId=134
don't forget to order the gasket and fuel rail seal kit also
http://fuelinjectorconnection.com/sh...&productId=134
don't forget to order the gasket and fuel rail seal kit also
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Joined: Nov 2007
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From: Carolina Beach NC
100 Percent!!!
Burning Brakes
Joined: Apr 2009
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From: Broken Arrow Oklahoma
I bought mine from Jon at FIC. He knows his business, and will help you with the install if you need it. He sends good installation instructions.
Plus his injectors don't come from salvage yards.
Plus his injectors don't come from salvage yards.
Burning Brakes
Joined: Nov 2004
Posts: 897
Likes: 12
From: Land of Whiskey Rebels, PA
I have had to replace my injectors, too. One of them failed and stayed open. Fuel poured into the cylinder and overnight filled the block up to the spark plugs. Pull the fuse to the fuel pump. Yeah, I know, "Bet your engine is really clean inside, now". Probably, but I could have had a really bad fire, too. Besides, I don't know what to do with the 5 gallons of gas/oil mix I drained out!
I replaced mine with stock injectors. Haven't had any problems. But, I am going to replace the Catalytic Converter (with a high-flow model), as I'm afraid that some gas could have gotten inside and ruined it. Another reason to pull the fuel pump fuse.
Mike
'90 'vert
I replaced mine with stock injectors. Haven't had any problems. But, I am going to replace the Catalytic Converter (with a high-flow model), as I'm afraid that some gas could have gotten inside and ruined it. Another reason to pull the fuel pump fuse.
Mike
'90 'vert
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Joined: Apr 2007
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From: Montgomery Alabama
Thanks for the advice man.
I just put a fuel pressure gauge and when i turned the ignition key to the ON position it read 30 psi. Once i started the motor it was bouncing around 30 psi. I think that's a bit low. Where do I start?
I just put a fuel pressure gauge and when i turned the ignition key to the ON position it read 30 psi. Once i started the motor it was bouncing around 30 psi. I think that's a bit low. Where do I start?
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
3 things you need. Air (unless you have a blockage somewhere, it should not be a problem. Spark (need a solid blue flame with no heat soak of the coil and other ignition components). Fuel (pressure and pulse width).
Can you have more than 1 problem? Sure. One way to see is to take a good spark plug and ground the threads. Disconnect a wire when it is running and connect it to this plug. Better yet, get a spark tester. You should see a strong blue flame at night.
Fuel. You need to have enough pressure. 45 psi is nice to have. Why is your's so low? Maybe there is an obstruction like a dirty filter, either in the tank sock or the actual fuel filter. Another problem is the fuel pump. Is it getting enough current? Is it weak?