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-   -   2004 Nissan Frontier with a miss. (https://x.nissanhelp.com/forums/frontier/11235-2004-nissan-frontier-miss.html)

Flintstone_flyer 04-24-2009 02:22 PM

2004 Nissan Frontier with a miss.
 
I have a 04 Frontier with 170,000 miles on it. The check engine light came on and I had it tested at Advance Auto and they said it was an EGR code. Now here is the strange part, the engine runs and idles fine but when you accelerate at 1500rpms it developes a miss then goes away after 1500 rpm. Could the EGR and the miss be related. Any advice on this would be appreciated. Also it is better to go ahead and replace the EGR or try to clean it?

sergey85 04-24-2009 02:27 PM

check this thread out, i htink u may have to clean something 1st http://x.nissanhelp.com/forums/front...ns-smooth.html also check out the service manual and download the engine control section that will tell u more info on your code http://x.nissanhelp.com/forums/Knowl...html?catid=174

streamcast 04-24-2009 06:20 PM

What engine is in the vehicle?

Flintstone_flyer 04-25-2009 03:44 AM

It is a 4cyl.

booklikeabook 05-17-2009 04:52 AM

I just had this same problem and the cause was clogged EGR tubes. I posted about it at clubfrontier.org under my same user namebooklikeabook...

Does your mileage suck?

Flintstone_flyer 05-19-2009 05:04 AM

Now what?
 
Ok I removed the EGR valve and tube and cleaned it really good with 2 cans of brake cleaner I replaced the plug wires distributor cap rotor button and plugs with factory replacement parts and guess what I still have the miss. Now it is comes and goes not a constant miss. What is my next step? Do I need to replace the EGR, hope not because it was a mother to get off and back on! HELP!

Flintstone_flyer 05-27-2009 05:41 AM

Anyone have any suggestions.

Madmax3 05-27-2009 02:43 PM

Did you check the operation fo the EGR valve? You should be able to apply some vaccum and see the EGR activate. if it does not then it is bad probably the diaphram is cracked. If it works then look for a bad vaccum hose going to the EGR valve. Look for cracks and holes especially at connections and where abraision may happen from rubbing on somehthing.

Flintstone_flyer 07-10-2009 04:56 PM

Ok guys I am going to bring this one back one more time. I now have replaced the egr valve with a brand new factory one as well as replaced the vaccum lines to the egr. IT STILL IS MISSING at 1500rpms. Any last suggestions before I break down and take it to a shop$$$$$$$$.

RoccoV 09-17-2009 06:32 AM

On other vehicles with high mileage, I have found that ports beyond the EGR valve have been carbonned shut, preventing EGR flow from reaching the induction system. The lack of EGR flow will throw off the air/fuel mixture and cause a lean condition; hence, the miss. Once the engine computer sees that the EGR valve has been commanded on, and no electrical faults are present, it adjusts the air/fuel mixture to compensate for EGR flow. The path of EGR flow may be different for every engine encountered, although carbon build-up is many times the cause of system problems.

Schrade 10-03-2009 11:41 AM

The EGR valve itself can be checked by pressing on the diaphragm, and seeing if it makes the motor stumble at idle. It should. If not, the pintle is not allowing air through the bore. Either the pintle bore itself is fouled, or the hose is fouled TO the valve.

tech22 10-04-2009 05:29 AM

Concure with Schrade.Also the 4 ports located inside the intake manifold are prone to clogging.The result will be hi exhaust gas temp(can be seen using a Consult 2).If you do remove the ERG valve make sure you have a new gasket to replace the old one.To get to the exhaust ports look at the manifold and you will see 4 counter sunk hex plugs. Under each one there will be a port.I've seen this many times and sometimes the ports will become so clogged that it's difficule to see the ports but they are there.


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