Well after driving the truck for 2 weeks straight, the CEL decided to come on when I was cruising home from work. Little background...1990 std cab with 22RE and 4 speed. It hasn't effected the way it runs but I can tell that my MPGs are going down now that its on. O2 sensors maybe??? Anyway to check and see what the code is??? Any help would be much appreciated.
There is a little box in your engine bay that says diagnostics if the cover is still on it. with the key off jump those 2 pins with a piece of wire, then go into the truck and count the number of times the check engine light flashes. it should do some long flashes then some short ones. like long long short short is code 22, long long long short short is code 32. get the flash code and come back and we can tell ya where to go from there.
Ok ill do that as soon as I get off work and ill let you know what I come up with. Thanks in advance!
OK so heres what I've got....jumped the wires and it flashes 5 times...pause...flashes 1 time....pause ...flashes 7 times...pause...flashes 1 time. Any ideas as to what code this is?
51 is a tps idle circuit code, have you messed with the tps sensor or idle adjustment? the other is an EGR code, it common for the VSV to go out on these trucks, or the vacuum hose to be off or rotten, or the EGR valve not work on its own.
Well it was idleing rough when I got it. I did an extensive tune up and then adjusted the idle where I thought it should be. Didn't know that would throw a code. What do I do to correct this? And kinda explain the second one to me a little more. How do I correct the second one?
Well when you adjusted the idle, did you mess with the screw on the throttle body? Cause thats setting the first code since the throttle is not closing all the way. hm, its kinda hard to explain the second code. Basically if you look on your hood there is a picture of all the vacuum lines and junk. If you look there is a little plastic valve called the VSV valve, some times its on teh fender some times is on the intake manifold, anyways this valve goes bad and the EGR doesnt open. Other times someone has moved vacuum hoses around and didnt put them back correct. Some times everything is working correct but the EGR is stuck shut, which means you jsut replace the EGR valve. Its one of those things you gotta look at and test parts to find the right broken item.
Ok......thanks for breaking that down. I'll try and narrow it down between the vsv and egr. As for the other issue...I did adjust the screw on the throttle body. It was idleing so low....what should I do?
