Max 93

We just did a heads, cam and intake on my friends car. The problem is it pours white smoke out the exhaust now. It doesn't smell like antifreeze or oil, just smells like exhaust. The car has not been tuned yet but it has less power than before the work was done. Any idea what could be wrong?

CamaroZ28Coupe

i know you said it doesnt smell like antifreeze, but dont rule that out yet, your head gasket may not be sealing completely somewhere, are the heads new or used (if used maybee they were not machined flat) other then that i dont know what it could be, what did you use for intake manifold gaskets cork rubber or a silicone form a gasket? (maybee used too much??) i dunno if that really matters but im just tossijng around different things, im sure someone else will be able to give you a better lead on whats going on in that engine

Max 93

I am going to go borrow a friends coolant pressure tester today and see if the system holds pressure. The heads and intake are brand new ( Dart Iron Eagle and Stealth Ram)

Max 93

I pulled put a few spark plugs and they look awfull. The electrode looks like new but the rest is covered in black soot.

92RS305#2

maybe your running real rich and its clogging the plugs, hows the gas mileage or have you not run it yet. but i believe white smoke is a sign of coolant leak. i'm no expert though

aklim

OK. Question time:

1. What car and what engine? L98? MAF or SD
2. What is the fuel pressure
3. What are you using for EPROM?
4. What size injectors

It does sound rich but until we know more, it is hard to tell.

Max 93

91 Camaro L98
Speed density
22# LT1 injectors
Hypertech chip
Not sure of the fuel pressure yet, my gauge doesn't fit the Stealth Ram fitting. I think they are preset at 40#.
stock bottom end, Dart Iron Eagle heads, HSR, XE 224/230 cam.
I did find a plug wire that was off and it seems to be somewhat better, but still not right.

Scales

Hey aklim, it's my car Max was posting about... After is was finally on all 8, the smoke seemed to be gone, but that doesn't really make sense. Like Max said, those plugs were covored in soot after ~30 minutes of running. Tonight, the exhaust smelled clean as brand new and it didn't smoke, but something still isn't right.... Granted, I'm still running off the Hypertech chip, but could the tuning or a plug wire be that much of a factor that it would pump out smoke the way it did???

aklim

Well, for all you HSR people out there, I have the part from Grainger that will solve your test port problem. I had to buy 6 of them and sold 2 and used one. With that you will be able to figure out what your pressure is.

Tuning would certainly be a factor. When I used 30# injectors, it just about flooded the engine and while driving, it would kick out black smoke. After 20 mins of driving, the plugs were shot.

If you want to check the plug wires, take a inductive timing light and clamp on each wire and see what rpm it gets while idling. It should be about the same. If one is way less, there is your problem. However, it it is a plug wire, only one plug should be affected and not all the plugs.

Scales

How much are you asking for the replacement Schreader valves?

aklim

I'd say $3.50 would cover it since it would have to be shipped in a padded envelope and need a couple of stamps.

Scales

Suppose I should ask if you'd wanna meet anywhere since you're not too far away....