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Discussion Starter · #3 ·
oil change about a month ago
spark plugs haven't changed in a while probably since 2012.. yikesss :(
air cleaner haven't changed in probably one year or could be two. yikes lol
pcv valve still the same..

i've been reading that i should clean my EGR Valve and change my air cleaner... perhaps? a change of spark plugs woulnd't hurt? hmm.....

never used inject cleaner. ;(
 

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If you have never used injection cleaner, shame on you. Shock the injectors with a slight overdose of Lucas' Injector Cleaner.

Then take your truck out on the hi-speed super slab and kick it in the but for a while. If that doesn't help, you may be looking

at a tune up, and possibly a new catalytic converter to clean up the mess. It is possible that the engine has been running rich

and killed the cat. (I had the same problem several years ago.)

Good hunting

Uncle Bob
 

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Air cleaner and EGR are a yes to service.

Fuel system cleaner and rub it hard. It is common knowledge a car should be run hard and cleaned out before a test. At least a 1/2 hour on the freeway. Some quarter mile runs really help. Changing the plugs may help some but it don't get the carbon out of the head and off the piston. Which causes higher compression. Which in turn causes higher NO readings.
 

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Discussion Starter · #6 ·
chevymaher said:
Air cleaner and EGR are a yes to service.

Fuel system cleaner and rub it hard. It is common knowledge a car should be run hard and cleaned out before a test. At least a 1/2 hour on the freeway. Some quarter mile runs really help. Changing the plugs may help some but it don't get the carbon out of the head and off the piston. Which causes higher compression. Which in turn causes higher NO readings.
oh ok then will change air cleaner and of course will take off egr and clean it real good...i will get one of those fuel system cleaners and run the van for a bout a 1/2 hour see if that owrks.
 

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Discussion Starter · #7 ·
RECox286 said:
If you have never used injection cleaner, shame on you. Shock the injectors with a slight overdose of Lucas' Injector Cleaner.

Then take your truck out on the hi-speed super slab and kick it in the but for a while. If that doesn't help, you may be looking

at a tune up, and possibly a new catalytic converter to clean up the mess. It is possible that the engine has been running rich

and killed the cat. (I had the same problem several years ago.)

Good hunting

Uncle Bob
my catalytic converter is brand neww bought it two years ago, but i will clean my EGR valve change the airfilter and of course run a injection cleaner on it.
 

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CargoCrawler taught me a neat trick. Keep a new gas cap, air cleaner, preheat snorkel hose, fuel filter, stuff like that, in a clean spot. A couple weeks before your smog check, put on the new stuff. Clean the injectors. Run it around the freeway. Then get your smog.

Mine is every 2 yrs so I just plan on replacing all that stuff every other year. The air cleaner I change more often, of course. The gas cap I keep for the smog check then put the old one back on unless the gasket looks weird.

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