Lanos Engine Starts but then dies out

Big Jeff · Post by **Big Jeff** » Thu Oct 16, 2008 10:16 pm

with you all talking about fuel filter and pump

i might just change mine filter at the weekend, also look at a better fuel pump, so i went on to my friend's friend website and saw this

http://www.rspec.co.uk/index.php?main_p ... cts_id=467

can any one tell if help my engine proformance

daewooluvr · Post by **daewooluvr** » Fri Oct 17, 2008 12:55 am

ugh, getting tired of troubleshooting this.

Changed both sensors on the throttle body. Didn't help.

I checked the fuel pressure. Before starting it held at 40psi. After starting it dropped to 36-38psi which I believe is normal.

Checked all the vacuum lines that I can think of, two had some cracks so I taped them up just to be sure that wasn't the issue, didn't help.

I'm running out of options here.

I'm still puzzled as to why the throttle body cleaner sprayed into the throttle body would allow the engine to run longer. This is what lead me to believe it was a fuel delivery problem. I'm getting good pressure at the fuel rail. Do you think it could be the injectors blocked up?

I have a spare set of fuel injectors although I'm not sure of how good they'd be.

I just got a full tank of gas, so I'm not out of gas.

Any other suggestions?

daewoomofo · Post by **daewoomofo** » Fri Oct 17, 2008 9:42 am

i say give the injectors a try

Daniel · Post by **Daniel** » Fri Oct 17, 2008 2:06 pm

Fuel pressure looks a little low to me. From service manual it should be between 41-47psi. Try another pressure regulator.
Engine runs longer with throttle body cleaner since this acts like fuel. You've made a throttle body fuel injection

.
Check 12V at pin 1 of the injectors. And if you can use a oscilloscope you may want to monitor pin 2 of injectors watching for pulses.

Daniel

daewooluvr · Post by **daewooluvr** » Fri Oct 17, 2008 2:27 pm

Daniel wrote:Fuel pressure looks a little low to me. From service manual it should be between 41-47psi. Try another pressure regulator.
Engine runs longer with throttle body cleaner since this acts like fuel. You've made a throttle body fuel injection .
Check 12V at pin 1 of the injectors. And if you can use a oscilloscope you may want to monitor pin 2 of injectors watching for pulses.

Daniel

Thanks, I'll give this a shot. What controls the injectors? is there anything that if faulty would stop signal to the injectors after it starts?
It seems to me that the injectors are getting a signal to start the engine, it's just when it has to idle that the signal dies. I'll check the voltage when I get home tonight

TheGreatAndPowerfulOz · Fri Oct 17, 2008 2:48 pm

From the wisdom of The Great And Powerful Oz ... (lol)

This sounds like your ECU has failed.

Also, the injectors are controlled by the ECU so that may be why the pressure is low.

Cliff

Big Jeff · Post by **Big Jeff** » Fri Oct 17, 2008 3:11 pm

i don't know if you have got one but an inmobilesser (i can not spell) would also stop your engine after it had started as it allows the injectors to work

surely if your ecu had fail it wouldn't start at all by it own

daewooluvr · Post by **daewooluvr** » Fri Oct 17, 2008 5:04 pm

Big Jeff wrote:i don't know if you have got one but an inmobilesser (i can not spell) would also stop your engine after it had started as it allows the injectors to work

surely if your ecu had fail it wouldn't start at all by it own

If it is the ECU it could do any number of things depending on where the malfunction is. I would assume that the startup function is different than the idle function of the ECU.

I just want this to be done and fixed.

daewooluvr · Post by **daewooluvr** » Mon Oct 20, 2008 12:42 am

Anyone have a spare ECU they could sell?

daewooluvr · Post by **daewooluvr** » Mon Oct 20, 2008 4:32 pm

Ordered an ECU today. Hope this works.

daewooluvr · Post by **daewooluvr** » Wed Oct 22, 2008 10:03 pm

UGH!!!!

Swapped ECUs, no change!

Does anyone have any other ideas what might be causing this?

daewoomofo · Post by **daewoomofo** » Wed Oct 22, 2008 11:36 pm

crank prositioning sensor? maybe the cam sensor. coil pack?

daewooluvr · Post by **daewooluvr** » Thu Oct 23, 2008 12:08 pm

daewoomofo wrote:crank prositioning sensor? maybe the cam sensor. coil pack?

at this pace I'll have a new car when I'm done. I think I'm going to have to take it to a stealership since I don't have the electrical tools to determine what the issue is.

daewooluvr · Post by **daewooluvr** » Thu Oct 23, 2008 5:12 pm

daewooluvr wrote:
daewoomofo wrote:crank prositioning sensor? maybe the cam sensor. coil pack?
at this pace I'll have a new car when I'm done. I think I'm going to have to take it to a stealership since I don't have the electrical tools to determine what the issue is.

Just had it towed to the shop

I'll keep you all updated.

daewooluvr · Post by **daewooluvr** » Fri Oct 24, 2008 12:02 am

daewooluvr wrote:
daewooluvr wrote:
daewoomofo wrote:crank prositioning sensor? maybe the cam sensor. coil pack?
at this pace I'll have a new car when I'm done. I think I'm going to have to take it to a stealership since I don't have the electrical tools to determine what the issue is.
Just had it towed to the shop I'll keep you all updated.

Ok, I stopped by the shop to get my jumper cables out of the hatch and to see what they were doing. From the sounds of it they actually made it worse. They said the the car doesn't start at all now. I dropped off my service manuals hoping that may help them. They said the signal to the injectors was weak but now there's no signal.
I'm going to check in with them tomorrow and if they haven't gotten anywhere I think I should pull my car out of there,