exhaust manifold getting to hot melting tps

[Tony9972]

1994 lumina apv exhaust manifold getting to hot melting tps. what can i check change egr valve.

[danielsatur]

How many miles + when was the last tune up?
Could it be a plugged catalytic converter?

You can do a smoke test to check EGR system, PCV system, and air intake system, see
http://www.automotiveforums.com/vbul....php?t=1040765

[Tony9972]

Originally Posted by danielsatur

How many miles + when was the last tune up?

You can do a smoke test to check EGR system, PCV system, and air intake system, see
http://www.automotiveforums.com/vbul...d.php?t=104065

197k did tune up plugs wires gas filter air filter. tried to connect to smoke test could not pull up

[Tony9972]

197k did tune up plugs wires gas filter air filter. tried to connect to smoke test could not pull up

[danielsatur]

My Bad, see http://www.automotiveforums.com/vbul....php?t=1040765

Don't forget to check the cat's out too!

[LMP]

I read about the smoke test:...wondered about the saran wrap first....then understood! next time I want photos! SHarp! ...I thinking about a substitute for the cigar.....

Tony, is exhaust escaping from EGR return tube ?....that is a 3.8, isn't it...

[danielsatur]

If you don't smoke!

Plugged the air filter with glad wrap, and drop your favorate color smoke bomb down the air duct work befor hooking air box up.

You can manually open + close the throttle plate by hand to control smoke.

[Tony9972]

Originally Posted by LMP

I read about the smoke test:...wondered about the saran wrap first....then understood! next time I want photos! SHarp! ...I thinking about a substitute for the cigar.....

Tony, is exhaust escaping from EGR return tube ?....that is a 3.8, isn't it...

no exhaust from egr, yes its a 3.8

[Tony9972]

Exhaust manifold had a crack under the shield replaced it . Had no power at all replaced cat. Running good but check engine lite still on. Thres a way to check code how can I do it I heard I can put a jumper in and get code from engine light does any one know how

[Jrs3800]

You will have to have a Scan Tool to check codes on your APV

It is common of the Tuned Port 91-95 3800 and the L67 SC 91.5 to 95 to crack the tubular manifolds... Glad you found that...

[Scrapper]

Originally Posted by Tony9972

Exhaust manifold had a crack under the shield replaced it . Had no power at all replaced cat. Running good but check engine lite still on. Thres a way to check code how can I do it I heard I can put a jumper in and get code from engine light does any one know how

did you reset the computer by taking of neg cable for about 15 mins then hook it back up see if it go's away? if it don't go out it may be o2's.