Truck is K1500 with a GM crate engine. Truck runs great, however, idle is odd. I installed new EGR valve to try to solve problem. beforehand, idle high until you drove a couple of miles, then shut off truck , re-start idel normal at 700 to 800 rpm. After ERG valve, On start up rpm is 500 to 700 rpm then goes to 900 rpm then goes to 1100 to 1200 rpm. sometimes it will run at 1000 rpm but shutting off engine in a couple of miles does not change idle speed. The idle module is not the cause, I do not believe, could it be the erg solenoid? Any suggestions to correct this problem. Of than this truck is great and drives as new.
You engine is TBI, It uses a MAP sensor check the vacuum line for crack and make sure yo have a good seal, The distributor also check and make sure the pick up does not have corrosion which causes the relutor to stick. As for the EGR it would cause a misfire, and yes the do fail. I am sticking with the IAC as a problem its a stepper motor and has a high failure rate, chack also the ECT (engine coolant temp sensor) for corrosion that gives false reading.
SOURCE: 2005 grand caravan-erg valve needs to be replace
had same problem 2005 Grand Caravan clean electrical connection to egr valve before replacing valve corrosion causes a low voltage to valve shows OBDII code P0404
SOURCE: erg valve
The EGR valve is located next to the TPS connector. It has two bolts holding it in place. You will need to replace the gasket when you take it off.
SOURCE: need location of the erg sensor 2000 ford ranger
The egr valve has two sensors. One is an EGR position sensor which is physically attached to the EGR valve. The other sensor is the DPFE (Delta Pressure Feedback EGR) sensor, commonly called the EGR pressure sensor. It's location varies depending on the engine you have. You can fine this sensor by following the vacuum hose on the EGR valve. It will be with in inches of the EGR valve. The sensor will be black (plastic) or silver (metal), have two or three vacuum ports and an electrical connection on it.
The vacuum pressure sensor is a high failure item on fords. Any Ford parts department will have one in stock, as well as some aftermarket parts stores.
The new sensor may not look exactly the same as the old part, but will have all the hook ups as the old one. You may also need to replace the vacuum hose to the sensor as well
SOURCE: Blocked Passage on ERG System,
Very common on Ford engines with EGR codes is the tube inside the intake manifold that takes unburned exhaust gasses and recirculates them back into the engine for reburning,the tube becomes restricted from hydrocarbons and just plugs up.The intake manifold and tube has to be removed and thoroughly cleaned.
SOURCE: I HAVE A P1491 CODE ON MY 1998 HONDA ACCORD ERG
Code P1491 is EGR lift insufficient. It is usually accompanied by P0401. If you have a v6 Accord, there was a recall for the EGR port plugging. Check with your Honda dealer to see if your car is covered under that recall. If you have a 4 cyl, plan on replaceing the EGR. In addition, you need to clean the ports in the engine on the intake and exhaust sides of the EGR ports. To do this, spray some carb/choke//intake cleaner into the ports to saturate the black exhaust build-up. Later, jam a coat hanger or spare dipstick (or some long flexible metal rod) into the parts to break up the black deposits. When your rod passes through easily, spray more cleaner to pass it through. Reassemble and start the engine. It will run rough at first, so you need to give it gas pedal input to burn off the carb cleaner. You should be good to go.
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could be your air mass control on air intake hose, they cost about 115.00 dollarsgd luck
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