Captainofiron

iTrader: (1)

So the car in the past has stumbled randomly while cruising at low RPMs on the highway. But it never died till yesterday and today.

I was coming home from work yesterday and about 10 miles down the highway, it stumbles, I see the CES light turn on blink, and it dies, so I pull off the road, let the clutch in and the tach drops to zero.

I hit the starter and it turns right on and I drive away, no problems.

SO then today

at teh same exact exit, the same thing happens the light blinks and it dies, I put in the clutch while still moving and crank the engine, it turns on and I drop the clutch and it dies again, so I put in the clutch and crank it and it turns on and dies, so I downshift to 3rd and dump teh clutch and hit the gas and away we go, no problems, then about half a mile down the road it stumbles but doesnt die

Any ideas?

I cant replicate this, I cant figure out what it is.

93z28ltone

What year car

ss.slp.ls1

iTrader: (36)

My buddy had a loose coil wire do that to him. Die/run/die. But really you have to check your entire ignition system (flashing SES light = misfire). I would try to have a scanner handy and scan the car for codes when the SES light comes on and the car dies. It might help you pinpoint your problem, unless you get the dreaded P0300 which gives you no real info. You can start with the easy things and work your way to the harder and more expensive things in the following order:
plugs=>>wires=>>coil=>>ICM=>>opti

93z28ltone

A bad map sensor was causing mine to die and would throw a code for it onistly it could be a number of things your fuel pump code be taking crap on you

jaycenk

iTrader: (1)

yea should really throw a scanner and a fuel pressure gage on it and see what it is doing. Some scanners have live data and freeze frames when DTC's are triggered. that would help you out the most.

93z28ltone

I depends on the year since mine was a 93 I checked the code right after it died on using the paper clip method and went on line too see what code meant but I think 93 is the only one you can do that with

Captainofiron

iTrader: (1)

its a 97, as stated in my sig



I dont think its the fuel pump as it fires right back up

Its weird, it doesnt do it in the morning when I am flying to work (75-80mph), but when I am going home in cruise at around ~65mph it does it

This makes me think that as soon as it goes into closed loop something trips and turns it off, I have had EGR flow problems (P0400 EGR flow malfunction) for more than a year, maybe its finally turning from an annoying glitch to a real problem

Im going to take it today to check for codes

Captainofiron

iTrader: (1)

Well

I took it to Autozone, and it turned out to be throwing trouble code

P1371

great

so My mighty MSD opti is giving me trouble

93z28ltone

Been seeing that a lot on here and I'm on a cell phone so your sig don't so up

95-1LE-Z28

iTrader: (33)

I had the same problem this past summer and it turned out to be my Opti Spark.

Captainofiron

iTrader: (1)

I just talked to MSD, and it only has a 1 year warranty, but they charge a minimum of 23 dollars and a maximum of 110 dollars to rebuild it

thankfully they are located in El Paso, which is about 40 miles from me

unfortunately I have to take this opti off

Captainofiron

iTrader: (1)

Im still really curious about why the car only would stumble and die on the way (in the afternoon) home when:

* It was cooler (~40 F) here in the mornings, vs ~70 F in the afternoon
* I was driving faster ~75-80mph in the mornings vs 65mph (cruise control) in the afternoon

There has to be some sort of correlation.

I took a video of when it died this time, from the time I turned the car on to when it died was about 13 minutes.
the engine temp was slightly below the 1/4 hash mark on the temp gauge

Captainofiron

iTrader: (1)

Yesterday I went by MSD and dropped off the opti, the engineer came out and talked to me, really nice people there.

He looked at it and asked what year LT1, and he said, wow this is a first run model, there are lots of updates to the design, and he then told me that they would do these updates for free.

SWEET

So they said probably Friday my opti would be ready for pick up.