93 Problem

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Jul 10, 2012 | 11:39 AM

damascusblade5

Thread Starter

5th Gear

Joined: May 2012

Posts: 5

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From: little hocking oh

93 Problem

My 93 starts but immediately dies like it is out of gas. The original owner lost the key, I had a new one made with the correct chip, it would roll over but no fire, I replaced the coil and ICM, now it starts but immediately dies. If I continuosly pump the throttle it will run. Replaced the fuel filter and pump but still the same. Any ideas what to try next, could it be the map or throttle postion sensor?

Jul 10, 2012 | 12:09 PM

pcolt94

Le Mans Master

Joined: Jan 2006

Posts: 5,620

Likes: 206

From: Orlando FL

Measure the fuel pressure so you know what the pressure is.

Make sure the connector is connected on the temp sensor on the front of the water pump. You could have bumped it off.

Jul 10, 2012 | 01:04 PM

Tom400CFI

Team Owner

Joined: Aug 2004

Posts: 21,543

Likes: 3,216

From: Park City Utah

Quote:

Originally Posted by damascusblade5

My 93 starts but immediately dies like it is out of gas. The original owner lost the key, I had a new one made with the correct chip, it would roll over but no fire, I replaced the coil and ICM, now it starts but immediately dies. If I continuosly pump the throttle it will run. Replaced the fuel filter and pump but still the same. Any ideas what to try next, could it be the map or throttle postion sensor?

I had the exact same problem and symptoms with my '92 when I first bought it. Problem? Wrong key (resistor chip in the key). Just like yours, the PO had previously had new keys cut...I THINK that he mixed up the old keys w/the new ones.

Anyway, are you getting a flashing "Security" light in the instrument cluster? If so, either you have the wrong key, or your connections from the tumbler to the CCM are bad.

Jul 10, 2012 | 01:44 PM

joe paco

Burning Brakes

Joined: May 2011

Posts: 838

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From: Louisville Ky

if a key/key read issue it should not start, correct? on 91, the SECURITY is on steady, with key in run, if key did not read.

joe

Jul 10, 2012 | 02:18 PM

Tom400CFI

Team Owner

Joined: Aug 2004

Posts: 21,543

Likes: 3,216

From: Park City Utah

It CAN run as the OP described w/pumping the accellerator pedal, but I forgot a detail; if the issue is w/the resistor pellet, or any wiring thereof, the car shouldn't crank w/the starter. The OP's does. In my situation, I manually grounded my starter relay, then had the "exact symptoms" the OP described.

http://forums.corvetteforum.com/c4-t...se-advise.html

Jul 10, 2012 | 02:21 PM

96GS#007

Race Director

Joined: Apr 2000

Posts: 15,344

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From: Texas

Fuel issue.

Jul 10, 2012 | 02:35 PM

joe paco

Burning Brakes

Joined: May 2011

Posts: 838

Likes: 2

From: Louisville Ky

Quote:

Originally Posted by Tom400CFI

got it, tom. read your posts. I'm just bouncing my experience off other people. the TPS does not supply fuel; only a voltage signal to ecm. the ccm signals ecm that the key was read, and then ecm supplies fuel once it sees pulses from dist. my grasp of it.

his issue does not appear to be key or vats related. sounds like fuel - a large category of possibiities, including one inj shorted out, tps, maf.

joe

Last edited by joe paco; Jul 10, 2012 at 02:38 PM. Reason: clarify : "ecm enables the fuel injectors"