...Check EGR circuit/switches. Check/replace EGR vacuum hoses. Check/replace EGR Vacuum Modulator. Remove and clean EGR valve. Test EGR valve by applying vacuum to open. If necessary,
vacuum pump to individualy test each port (two of them) on the vacuum advance diaphram. You should see it pull back, if not replace it. They are sold at your local auto store, oddly its cheaper to get
...test fuel pressure. refer to a haynes manual for correct pressure specs. Also be sure all vacuum lines are good. Toyotas are bad about vacuum leaks causing running issues. sounds like low fuel press. ...
...test performed this way the techn. can determine if there are any vacuum leaks that are causing the miss. If this turns out to be a-ok then the techn has to do a Injector balance test. might be an ...
emission test 1997 toyota corolla hc and co very high hc 235 co3.59 running too rich, probable causes spark plugs, pcv valve malfunction, leaking injectors, vacuum leak, catalytic convertor, o2 sensor
...vacuum valve or EGR valve that may clear with a bit of normal use. Your going to find out for sure when you get your SMOG check because most of the time they will not pass an emissions systems test ...
of the following reasons: Idle air control valve. Throttle body clogged. Weak cylinder compression. Vacuum leaks. PCV valve defective. Fuel pump regulating valve. Ignition system
...test for vacuum leaks effecting only one cylinder You also have to consider a fuel injector problem For me personally,if it was mechanically sound & I was keeping it,I would mail the injectors ...
Question about Toyota Corolla
...test performed and it shows the compression on all four cylinders is correct. Then it is time to replace the timing chain. Bad alt or bad ground cable ck charging systems let me know Check all the ...
...vacuum to the AAP and thus extra gas during warm up. As a test remove the bottom hose off of this mlti-valve and connect directly to the vacuum feed to this multi-valve on the intake. It is just a ...
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