Jump to content
kiran_182

Engine idles down and cuts out

Recommended Posts

kiran_182

Abd 3f injection. 

 

Start the car and runs fine for 3 or 4 min then idles low and cuts out, wont repond to throttle when chugging and ramind this way on restart unless left 

 

Any ideas 

Share this post


Link to post
Share on other sites
steveo3002

id suggest you get the diag leads and vcds and have a look for fault codes , can also read a few live data feeds like temp /tps/lambda etc

Share this post


Link to post
Share on other sites
dvderlm

Hall sender failure is a bit like that. Cuts out randomly, but will start again once cooled down.

 

But the slowing idle is an odd one. Is it smooth or lumpy idle?

If smooth - fuel delivery, otherwise electrical issue in my experience.

 

 

Share this post


Link to post
Share on other sites
JoeUK

As suggested above, my last lambda resulted in similar symptoms of the idle degrading after a few minutes as it all starts to warm up. Can always test it, multimeter readings are deffinately on here somewhere. Same for the temp sensor, theres a range of resistance or voltage readings over a range of temperatures. Mine idled like crap as the ECU began using the faulty sensors signal.

 

More recently had a worsening fuel leak on one of the rubber pipes which in the beginning I'd get a few miles then it would start chugging then eventually cut out, throttle would do nothing to help obviously. The car was said to be getting a little filler neck rot on the last mot so fuel smell wasn't surprising untill it stank, by that point it wouldn't run at all though, been in the garage waiting for time to put the fuel tank in but fixed the leak and it runs pretty damn well now.

 

Goodluck

Share this post


Link to post
Share on other sites
steveo3002

you can unplug the o2 to prove it...should run well without one 

 

also it wont come into play until the engine is warm ...

Share this post


Link to post
Share on other sites
kiran_182

Its chugs as it idles low so electrical is probably right. Ill try it with the lambda un plugged and see

Share this post


Link to post
Share on other sites
steveo3002

assume youre aware of how to set up a gt ?    ajust the idle and timing etc?

Share this post


Link to post
Share on other sites
kiran_182

Yeah ive already wound the idle out advanced the dizzy and to see what happens. Used all my little tricks and not happy with running it this way

Edited by kiran_182

Share this post


Link to post
Share on other sites
steveo3002

so was this a running gt that youve just changed the engine over?

Share this post


Link to post
Share on other sites
kiran_182

Abd head and block on gt injection 

 

Put the obd on.amd got 5 codes

• Intake air temp sensor - no signal

• Engine coolent temp sensor - open / short

• potentiometer for air flow meter - no signal 

• oxygen sensor - no signal 

• throttle position sensor - no signal 

 

I recal un plugging somemof these when testing so they may not be current 

 

Share this post


Link to post
Share on other sites
steveo3002

does your scanner do the live data

Share this post


Link to post
Share on other sites
kiran_182

Got the multimeter out and tested reistance on the loom 

 

Ecu connector ports, resistance ohms 
1 2.0
2 0.8
3 0.8
4 blank
5 blank
6 0.8
7 blank
8 0.6
9 0.8
10 0.6
11 0.6
12 0.6
13 2.7
14 0.8
15 blank
16 blank
17 0.6
18 0.7
19 2.4
20 no signal - later found to be obd
21 0.7
22 blank
23 0.6
24 0.6
25 0.6

Share this post


Link to post
Share on other sites
MonsterL35YFP

This is probably a shot in the dark but I had a very similar problem but would cut out at random and it turned out to be warn out HT leads 

Share this post


Link to post
Share on other sites
kiran_182

Got a timing light on it today. started off running ok but needed full advance could still hear it fighting to run after a min or two it idled down and chugged with the light going out for long periods at a time 

Share this post


Link to post
Share on other sites
steveo3002

might suggest the cam timing is out

Share this post


Link to post
Share on other sites
kiran_182

Took some pics of the timing marks

20180927_092039_zpskmvzc83i.jpg

 

20180927_092049_zpshafdcq6b.jpg

Share this post


Link to post
Share on other sites
kiran_182

Got a few hours on it today. altered the timing mark, with the cam timed the crank mark is just under the right tab

 

Got thw car to run fairly well for 20 odd min but once hot it splutterd and struggled to restart, would missfire when you turn ignition on, before you try crank

Share this post


Link to post
Share on other sites
steveo3002

have you got the correct fuel pump relay...mine wouldnt hot start with the wrong one

Share this post


Link to post
Share on other sites
kiran_182

Ive been overlooking that. Ill check it out.

Share this post


Link to post
Share on other sites
kiran_182

This is from thur 

 

Went to start today and it cranked but wouldnt fire 

Share this post


Link to post
Share on other sites
dvderlm

Not quite sewing machine sound is it. More like a hay thresher.

 

You were losing sparks, if you mean the timing light was not flashing in synch with cylinder 1 when it was 'chugging'.

 

 

 

 

Share this post


Link to post
Share on other sites
kiran_182

The first vid i got was more sewing maching, this is idle screw wound out and full advance to run with trottle to start 

Share this post


Link to post
Share on other sites
dvderlm

Sure, but it should not need that much advance.

Did you check the fuel pump relay?

 

My bet is Hall sender. The rest of the ignition technology is solid-state and away from engine heat/oil.

Share this post


Link to post
Share on other sites
dvderlm

What happened when you unplugged lambda?

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. Terms of Use Privacy Policy Guidelines