I just failed smog on the "oxides of nitrogen" ... I wanted to check the egr valve and fittings as they recommended. My Chiltons said it's located under the intake manifold, but I can't find it ! HELP !
2007-11-24 08:50:46 · 4 answers · asked by Illegaltracker A 1 in Cars & Transportation ➔ Car Makes ➔ Volvo
you dont have one, replace the catalytic converter and make sure your fan clutch and cooling system are working properly, retrieve the diagnostic trouble codes if you can.
2007-11-25 07:39:11 · answer #1 · answered by Volvo-Guru 3 · 0⤊ 0⤋
your car should not have an egr valve.
oxides of nitrogen emmissions increase with higher than normal combustion temps
[these can be caused by but are not limited to]
vacume leaks that the o2 sensor may be masking [small ones such as climate control or cruise control leaks,
larger ones such as cracked intake gasket
timing problems such as ign. too far advanced [i believe 1988 was last year of electronic distributor, i know 1989 uses a crank trigger off of the flywheel] faulty knock sensor [rare] cam timing a tooth off.
other common possibilities include a failing air mass unit[if this is the case don't forget to replace thermostat in air filter housing]
or a dead o2 sensor [should vary between .2 and.9 volts fairly rapidly at warm idle]
i hope these tips help good luck
2007-11-25 02:39:57 · answer #2 · answered by hobbabob 6 · 0⤊ 0⤋
There is not an EGR on a 88 . Didn't start until 89.If your engine is tuned properly , you either have a bad cat or to much compression . Two ways to high compression. 1. Head has been milled. 2. Carbon build up in compression chamber.Replacing the cat may be the easiest fix.
2007-11-24 12:59:39 · answer #3 · answered by David S 5 · 0⤊ 0⤋
I didn't know they had an EGR 'cause my 740 2.3L doesn't.
I failed smog too and I just got a three way catalytic converter. It cuts down NOX as well as CO.
2007-11-24 09:33:25 · answer #4 · answered by Anonymous · 0⤊ 0⤋