(they for repainted red before installation.)
Surging on Acceleration
Thread Starter
Drifting
Joined: Jul 2003
Posts: 1,613
Likes: 0
From: Orlando FL
Surging on Acceleration
I am finally am trying to address my acceleration issue. Basically, at full throttle, it feels really underpowered and then BAM! I'm also really off on my gas mileage (14 on the highway). I checked the plug wires (which are about 5 years/20K miles old) and at least one has hit something hot and melted through. Would this be wholly responsible for my issue? I guess I am going to pull the plugs to. I tested the fuel pressure and that seems good. I replaced the filter sock on the fuel pump. I'll check and clean the throttle body. TPS is set to .54
What else should be checked? Any suggestions for plug wires/plugs?
What else should be checked? Any suggestions for plug wires/plugs?
Melting Slicks
Joined: Jan 2008
Posts: 2,065
Likes: 1
From: Jasper Texas
Its possible that wire is the culprit. I don't think ohming the injectors will turn up anything. The 85s had bosch injectors and the coils are not prone to failure like the multecs of later years (according to jon at fuel injector connection).
Melting Slicks
Joined: Jan 2008
Posts: 2,065
Likes: 1
From: Jasper Texas
sure, http://forums.corvetteforum.com/show....php?t=2055839
What kind of injectors did you replace them with?
What kind of injectors did you replace them with?
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Doubt it's fuel unless the pump is bad - acceleration takes place because you're adding air, so start with something simple like the air filter - capture some data with a scanner to see what the MAF is sending - and you could make sure the fuel filter was clean, though if that was plugged up, it'd probably wouldn't go anywhere.
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Le Mans Master
Joined: Dec 2003
Posts: 5,768
Likes: 33
From: Van Steel Corvettes
St. Jude Donor '12-'13
Might want to check for a clogged cat too. When mine on my truck collapsed it ran like a dog. Gas mileage and acceleration where no where to be found. New cat and I had a whole new truck.
Thread Starter
Drifting
Joined: Jul 2003
Posts: 1,613
Likes: 0
From: Orlando FL
filter is relatively new...and there are no cats to worry about. 
i guess i need to get that windows diagnostic program and start reading charts too...
the thing thats got me stumped is that once i've stood on the pedal long enough, it runs like a champ.....until the next time i go to acclerate.
i guess i need to get that windows diagnostic program and start reading charts too...
the thing thats got me stumped is that once i've stood on the pedal long enough, it runs like a champ.....until the next time i go to acclerate.
