1984 corvette power issue ?
Thread Starter
4th Gear
Joined: Mar 2013
Posts: 4
Likes: 0
1984 corvette power issue ?
So my 1984 chevy corvette crossfire injection
Idles okay when you put it to drive it. When you start to step on it will feel okay if you step on it more the the cars power Won't kick on to a while or unless step on it more the power will start to kick in. People have told me it could be tps (throttle position sensor) or it can be my fuel injector. Not sure. The other thing is that sometime I start it up and drive it than when I step on it more let gas pedal go the car will stall out and be at low rpm. I would have to be slowly pushing the gas pedal it Won't stall out. If you guys know the problem is it would help a lot thanks.
Idles okay when you put it to drive it. When you start to step on it will feel okay if you step on it more the the cars power Won't kick on to a while or unless step on it more the power will start to kick in. People have told me it could be tps (throttle position sensor) or it can be my fuel injector. Not sure. The other thing is that sometime I start it up and drive it than when I step on it more let gas pedal go the car will stall out and be at low rpm. I would have to be slowly pushing the gas pedal it Won't stall out. If you guys know the problem is it would help a lot thanks.
Heel & Toe
Joined: Jun 2011
Posts: 17
Likes: 0
Hey, with my 84 any problems ive ever really had were fuel related. Get a new fuel filter on it, and check the fuel pressure. it should be around 13-14psi. Mine did something similar when I first got it. I changed to an 85 fuel pump and bought the pressure gauge line from DCS and it ran like a top
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
The '84 pump is a low volume, low pressure, centrifugal pump.
The " '85 pump" (OR, any pump for a port EFI vehicle) is a fixed displacement pump capable of generating high pressure. The later style pump is better. If you diagnose low fuel pressure due to the pump, you don't have to get the "85 TPI pump", you can get any later model pump for a port FI application and the later pump you get, the better.
You can easily "T" into the rubber fuel hose that runs from the frame to the engine on the CFI car.
The " '85 pump" (OR, any pump for a port EFI vehicle) is a fixed displacement pump capable of generating high pressure. The later style pump is better. If you diagnose low fuel pressure due to the pump, you don't have to get the "85 TPI pump", you can get any later model pump for a port FI application and the later pump you get, the better.
You can easily "T" into the rubber fuel hose that runs from the frame to the engine on the CFI car.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
The very first thing that I would check are the Diagnostic Trouble Codes.
See if any code is set.
Could be a
- Fuel Pressure issue
- Clogged CATs
- Damaged /clogged/ wet Air Filter
There are a LOT of thing to check before you start throwing parts at it.
Please let us know what it turns out to be.
Bill
See if any code is set.
Could be a
- Fuel Pressure issue
- Clogged CATs
- Damaged /clogged/ wet Air Filter
There are a LOT of thing to check before you start throwing parts at it.
Please let us know what it turns out to be.
Bill
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
I'd like to know how any of those things would throw a code.
I'd also like to know how the possible issue you suggested would have any effect on the OP's issue -other than the fuel pressure, which the ECM has no idea what the FP is.
The guy needs to START, w/a fuel pressure gauge here.
I'd also like to know how the possible issue you suggested would have any effect on the OP's issue -other than the fuel pressure, which the ECM has no idea what the FP is.
The guy needs to START, w/a fuel pressure gauge here.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Why wouldnt reading DTCs be a place to start??????????? I never said that they would throw a DTC. There could be a DTC related to something else.
Could be something emissions or ECU related.. Right?????
Ever driven a Car with a clogged CAT?? Same symptoms.....
How about a frozen air filter.. Same symptoms.
I never said that the fuel pressure or fuel filter theory was wrong either. Could be...
Could be something emissions or ECU related.. Right?????
Ever driven a Car with a clogged CAT?? Same symptoms.....
How about a frozen air filter.. Same symptoms.
I never said that the fuel pressure or fuel filter theory was wrong either. Could be...