Ecotec Cold Start Problem

[mcvk]

Hi all,

I was on holidays and did not drive my car for a week. When I got back my cars was fine for one day.

Now when I start the car when the engine is cold the idel is rough (it's like the car is running out of fuel). This morrning just after starting the car I reved the engine I noticed that the revs droped and the engine stalled.

After about 30seconds the car runs fine.

Any advice would be great.

P.S. I installed a performance chip a bit over a month ago, but given that it ran fine with the new chip for a month I dont think this is the problem.

[V-Josh-R.]

Check your fuel filter for a clog or something, or something wrong with the rails?

[jas98]

no one stole your fuel?? sounds like fuel problem as said

[kopper69]

Would be worth checking the fuel pressure regulator too. There is a vacuum hose running of it. Check this for fuel. If there is any fuel in the vacuum line, replace it. The regulator may be leaking a little bit of fuel back into the inlet manifold, flooding the engine. Once started the car may run rough as it burns all this extra fuel, but can use it up when it is running.

Could check error codes too.

[[Linkin Park]]

Hi all,

I was on holidays and did not drive my car for a week. When I got back my cars was fine for one day.

Now when I start the car when the engine is cold the idel is rough (it's like the car is running out of fuel). This morrning just after starting the car I reved the engine I noticed that the revs droped and the engine stalled.

After about 30seconds the car runs fine.

Any advice would be great.

P.S. I installed a performance chip a bit over a month ago, but given that it ran fine with the new chip for a month I dont think this is the problem.

It is the chip my mats el falcon had a very similar prob. the car was sputterin and stalling constanly be punched the computer (not too hard) and that fixed it. the chip might have a loose connection. Im not sure but i think it is a power chip in his car

[mcvk]

The car definitly had fuel in it. However, this is the first tank of V power fuel I have put in it.

I have also noticed that when it is running rough if I feed the throttle on the revs climb nicely but if I quickly go to about 50% throttle the revs drop and the engine wants to stall.

[crazybiker]

Checked plugs?

[V-Josh-R.]

The car definitly had fuel in it. However, this is the first tank of V power fuel I have put in it.

I have also noticed that when it is running rough if I feed the throttle on the revs climb nicely but if I quickly go to about 50% throttle the revs drop and the engine wants to stall.

Definetly sounds like a flooding issue. The car will roll the revs on slowly but when you gun it it cant burn the fuel and therefore no drive power?

[crazybiker]

Definetly sounds like a flooding issue. The car will roll the revs on slowly but when you gun it it cant burn the fuel and therefore no drive power?

Which could also be the plugs.

[mcvk]

Just a reminder that it is only an issue when the engine is cold, after running for 30sec to 1 min it is fine.

[V-Josh-R.]

Just a reminder that it is only an issue when the engine is cold, after running for 30sec to 1 min it is fine.

Thats probably because after about a minute it has burnt up the fuel that is causing the flooding in the first place...?

[moff_man]

tps blocked or throttle body blocked. i was thinking airflow meter before but the issue clears up which means to me it could be a particaley blocked tps.
the check eng light isnt on is it?
also it could be the plugs but its strange its only done this since its been sitting for a week with out a start.

[hako]

Coolant temp sensor possibly?...the one that tells the ECU to lean the mixture as things are warming up.