ok will do that thanks. I been looking up videos but still didn’t really know where to start. I’ll go with what you saidP0400 - the EGR circuit - less flow than what is expected. With the engine warmed up, very carefully (so you don’t burn your fingers) push the diaphragm in the EGR forward (using the metal tabs and not the actual fabric of the diaphragm). Your engine should try to stall. If it doesn’t, it means that the EGR or its circuit is clogged with carbon. You can take the valve off and clean it thoroughly with carb cleaner, and ream out the intake and exhaust ports while the valve is off the car. Before putting the valve back on, start the car for about 1-2 seconds - it should rev very high and blow more carbon out for you. Note that you may have to do this a number of times, particularly if there is 20+ years of carbon in the circuit.
P0510 - TPS. Just thinking, as you’ve been working in the engine, check the connection to the TPS and wiring going to it. In the past, you said this only came on in 4wd. Does this now happen in 2wd??
You cannot check the ignition timing by looking at the dist, you need a timing light for that.."QUOTE="RoyceGetit, post: 1559481, member: 255038"]
I’ll check tps too. I was messing around the distributor when I took it off to check if the rotor lined up with the timing
I see. The engine has to be warm first. I thought it just had to be warm for the test and I couldn’t feel anything to push against. I guess the diaphragm only comes out when warm. Thanks for the clarification I appreciate it!Yes, that’s it. Look at the EGR in your second photo. If you put your finger into it, in between the metal ‘spokes’ that you see in the photo, you will feel a metal bit inside there. You will not be able to push it forward unless the engine is running. You need to do the test with the engine warmed up, so be careful not to burn your fingers when doing this - gloves or some other protection is good - don’t use anything sharp, as if you miss the metal inside the valve, you can puncture the diaphragm.
So I tried pushing on the diaphragm while the engine was warm but I couldn’t feel anything. I tried a few times and it feels the same as when I try it with the engine cold. I can’t seem to figure it out. Maybe I’m doing it wrong. Would there be another way I could test it? Is it easy to remove?The engine has to be running. When the ECU comes online, it activates the EGR circuit with vacuum. The point about doing it when the engine is warm rather than cold, is that when the running engine is cold, the idle is very high, which will counteract the idea of the engine trying to stall when you push the valve forward.
Sounds good! I’ll look for a vacuum pump today. ThanksYes, use a vacuum pump on the diaphragm nipple to activate the valve..