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Old 05-15-2019, 08:05 PM   #1 (permalink)
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Default Disable EGR Valve

Hi
I have a 2012 Jimny Sierra 4x4 1.3L petrol motor.
My location is Australia.

Problem is car starts OK when cold but once it's warmed up it is difficult to start. When driving it runs and idles OK with a very slight stutter at idle.

HISTORY
The car belongs to a family member which has had a very bad service history, in fact it had not received an oil change in 2 1/2 years.

WHATS BEEN DONE
I have restored the car cosmetically, however the engine does not run quite right.

It has had two engine flushes new oil now in it. A cracked manifold replaced.
New spark plugs fitted.
It spent 7 days in the Suzuki workshop where they tested everything saying all is OK but could not solve the problem.

Another mechanic suggested the EGR Vale could be the problem. Suzuki dealer informed me the EGR Valve $650 is available but the gaskets are now discontinued.
The mechanic said that a simple test is to disable the EGR Valve pipe with a blocking plate on the manifold.

I was wondering if anyone has tried this and what were the results?
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Old 05-15-2019, 08:22 PM   #2 (permalink)
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difficult to start warm is not likely to be an EGR valve. Check fuel pressure and fuel regulator
does it start easier if throttle 1/3 pressed? held wide open?

more symptoms please
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Old 05-15-2019, 08:38 PM   #3 (permalink)
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Hi
Thanks for the reply.
Like I mentioned, when cold starts first go no acceleration required. After a short drive and engine is hot restarting requires pumping of the accelerator. It will start after several pumps.

I should have mentioned the engine only has 71000km's on it.
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Old 05-16-2019, 08:10 AM   #4 (permalink)
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As the engine is FI, pumping the gas has no effect... Use a scan tool and check the Engine temp when cold and hot...

advise on results of 2013' s advice


,,, philip
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Old 05-16-2019, 06:13 PM   #5 (permalink)
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Quote:
Originally Posted by aquanaut20 View Post
As the engine is FI, pumping the gas has no effect... Use a scan tool and check the Engine temp when cold and hot...

advise on results of 2013' s advice


,,, philip
Hi Philip thanks for your reply. Re 2013's advice, after driving the car approximately 5km's the car would not start with throttle 1/3 pressed or held wide open. It just turns the motor over and over. The only way it started was to pump the accelerator and it starts after about the 4th or 5th pump and then when the throttle/accelerator is fully pressed.

I don't have any scan tool but the mechanic did a scan which he said pointed to the EGR valve.

Not sure what the temp actually is but it's to hot to place your hand on when hot, and when cold our outside temp is around the 25 deg C at the moment.

Again thanks all for your input I really appreciate it.
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Old 05-16-2019, 06:16 PM   #6 (permalink)
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if it starts with gas pedal floored after pumping it, means its flooded. Pumping the pedal only adds gas while its cranking, flooring it shuts off the injectors to allow it to clear excess fuel. You have effectively flooded it then cleared it.

Check ECT sensor as Philip suggests as it could be seeing engine temp as cold even when warmed up, adding extra fuel to try and start it.
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Old 05-16-2019, 06:47 PM   #7 (permalink)
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Quote:
Originally Posted by 2013GV View Post
if it starts with gas pedal floored after pumping it, means its flooded. Pumping the pedal only adds gas while its cranking, flooring it shuts off the injectors to allow it to clear excess fuel. You have effectively flooded it then cleared it.

Check ECT sensor as Philip suggests as it could be seeing engine temp as cold even when warmed up, adding extra fuel to try and start it.
Thanks I'll have it checked.
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Old 05-17-2019, 07:17 AM   #8 (permalink)
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Well The EGR Valve was replaced this afternoon and all is running fine. Idle is smooth and the car now starts when hot with no acceleration at all.

Again I'd like to thank everyone who offered suggestions,, much appreciated.
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Old 05-17-2019, 12:42 PM   #9 (permalink)
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Glad you are up and running...

Q: how did the EGR fail? Carbon, damaged diaphragm, stuck piston?
Q: Did the mechanic clean the EGR runner to ensure no carbon flaking and chocking new valve?

..... Philip
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Old 05-18-2019, 09:22 AM   #10 (permalink)
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Quote:
Originally Posted by aquanaut20 View Post
Glad you are up and running...

Q: how did the EGR fail? Carbon, damaged diaphragm, stuck piston?
Q: Did the mechanic clean the EGR runner to ensure no carbon flaking and chocking new valve?

..... Philip
It was replaced with one from a wreck.

The car I have been fixing was completely ruined both mechanically and cosmetically. It had not had an oil change in over 2 1/2 years. So I guess Carbon build up was the main problem, he said he had cleaned the location so the new second hand one would be OK.

I was able to restore it cosmetically but I'm no mechanic. I had to use pliers just to get the dip stick out. Every fluid in the car was at the lowest it could be or was completely empty.

It was in fact one step from the wreckers. Now after about 2 months and a lot of elbow grease plus about $1500 it looks and drives very good.

I still prefer my Toyota Aurion though

Last edited by knightal; 05-18-2019 at 09:29 AM.
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