slsnider423

Hi folks. Has anyone had this problem? I have a 2003 MY Z06 with about 71000 miles on the clock. I took a trip last Summer - on the way back, I was stupid and didn't check the oil level. The car stopped running and gave me a "low oil" warning. It would turn over, start running, and then stop...like it ran out of gas or had the fuel shut off. Once I added oil, the problem stopped and the car ran fine. Except......

Now, on an intermittent basis, the car will suddenly lose power and stall out - and act the same as it did when the oil was low. I was driving home the other day....the car was running great!....but coming up my road, it lost power and shut down. I tried starting it....the engine turned over, started, then stalled out. I waited a couple of minutes, tried again, and the car ran fine.

What could be wrong? The oil level is fine.....I had the oil changed when I returned from my trip. Everything else seems to be running fine. Any ideas or suggestions? Thanks!

zdeckich

I would like to know as well. I haven't had that problem but I hope its a easy fix for you. Sorry I couldn't help. Maybe a electrical issue?

PeteZ06

I've never heard of a low oil level issue stalling out an engine.

When was the last time you changed the fuel filter? What shape are the battery/alternator in?

I would start checking things other than oil level.

slsnider423

Apparently, the Z06 has a safety feature. When the oil level goes too low, the computer cuts off the fuel to prevent engine damage. I was depending on the "Oil Life" percentage levels. I learned.....I check my oil level frequently now!

The battery is brand new and the alternator is fine. Voltages are normal. But I'm not sure about the fuel filter...good idea! I purchased the car last February - I haven't changed the filter yet, and I'm not sure when the previous owner did. So I'll check it out. Thanks!

0JDP Tech

Doesn't sound like its anything related to oil level or pressure, have you checked for any codes in the engine control module?

And in my opinion, the oil life monitoring thing is a joke, in a performance vehicle I would never base my oil changes off of it, unless you change it at the 30% mark or something. A huge part of its programming is vehicle ownership cost; the less you have to change the oil, the cheaper it is to maintain, the cheaper it is to own, the more it appeals to people.

Feel free to call, email, or PM us anytime with questions!
- Jeremy

slsnider423

Hi there. Yes, I did have some codes: P0133, P0153, and U1160. I have a set of Kooks headers on the car, and even though it was tuned, the codes may relate to the headers. I spoke with the Service Manager at Reliable Chevrolet in Albuquerque about the problem and the codes. He didn't think the codes related to the current problem. It's probably fuel-pump related. The car has now been towed to Reliable and I hope to have the problem identified and fixed by mid next week. I'll post and let everyone know what Reliable found.

ssrallyred

The PO133 and 153 are very common with headers. Most tuners just turn them off if indeed it has been tuned.

wtb-z

I had similar sounding issues with no codes. Nothing obviously wrong with the car - replaced the crank position sensor and it fixed the issue.

LT1driver

fuel filters are in tank, big job GM should have left outside of tank, anyway good luck and let us know.

slsnider423

Thanks....I'll pass this on to the tech that's working on the car. So far, Reliable Chevrolet hasn't been able to identify the problem but will continue the search on Monday with one of their senior techs.

slsnider423

Thanks.....and I agree.....why isn't the fuel filter in an easy-to-get-to location and easy to replace? Planned obsolescence? To ensure an expensive procedure? I love my Z06 but come on GM!!! Who engineered this situation??

PeteZ06

I believe only 03-04 Z's have that engineering shortfall.

Moto One

It's possible that you have an air leak past the MAF (mass air flow sensor), ether in the manifold or vacuum line.

Just a different direction of thought.

Been there and fixed it.

Mark.

lilgbz28

I just had a problem like you said with my 04 z06. After checking all electrical components it turned out to be the computer stopped telling the fuel pump relay to turn on. Replaced the computer all is good. To figure out if its that pull pump relay out and jumper the connection

cor28vettes

Best advice I can give OP is to post in the TECH forum and/or do advance search there on any mechanical issues.

As far as the fuel filters being in the gas tank...that's covered in a 33-page thread titled "Fuel leak 2004 cracked crossover connector smell", which also includes late 2003. That and many issues are include in "The best ever thread...http://forums.corvetteforum.com/show....php?t=1249213 (scan pages 1-3)

slsnider423

Hi folks. Reliable Chevrolet called me today. The problem.....a faulty ground circuit that affected a number of other circuits. They are repairing the problem. They also found a couple of belts that I probably could have lived with for awhile, but it makes sense to have them replaced while the car is in the shop.

A faulty ground circuit. So fellow Z06 owners, add this to your list of possible causes of firing up/stalling. I should get the car back tomorrow, and I'll let everyone know if the problem is really solved!

cor28vettes

Once confirmed, U can also add to this
http://forums.corvetteforum.com/show....php?t=2825794
note post #30

slsnider423

I posted a note on that thread. I got the car back yesterday and it operated just fine with no problems. Reliable Chevrolet repaired "Circuit #150" and the car started right up. I'm going to drive it today and see how it does. In spite of the occasional problems, this Z06 is a blast to drive!

Cscokd

Personally I think the two codes PO133 and 153 will trigger "Reduced Engine Power" causing your car to stumble and stall. Just my 2 cents.

C5 Diag

This is a 7 year old thread…those 2 O2 sensor “slow response” DTC’s will NOT cause a Reduced Engine Power !!