Probably buying an 87 Caprice, Centerbolt LG4.

Anyway, It's got a CCQ-Jet, and it diesels, bad.

The trusty haynes manual says dieseling is one of 5 things.

1 High idle speed
2 Electronic solenoid at side of carb not functioning properly.
3 Bad timing
4 Bad THERMAC (WTF, Like that would reall make a difference..)
5 Engine too hot.

I'm gonna rule out the THERMAC, timing and operating temp for the purposes of this post.

Since I'm too lazy to research this one, kinda busy lately, I need some info.

The mixture control solenoid is goverend by the ECM via O2 sensor, I'll assume Coolant temp sensor, and what else?

The "Electronic Solenoid" at the side of the carb, what is that?

Next topic, The idle is REAL rough, we're talking 72 F100 with bad shocks on a field full of ground hog holes rough.

Third topic, the AIR line running to the cat, has blown out, it looks like someone taped a firecracker to it and burst a hole in the stainless line.

I'm trying to find the correlation, but I'm not seeing it. I'm pretty much sure the O2 has never been changed after 130K miles. But how detrimental to the CCQ-Jet system is the O2?

 

BTTT

 

the solenoid on the side of the carb i believe is the anti-dieseling solenoid, octane too low and timing would be where i look first, and maybe the choke adjustment. you ought to send a link to ed maher

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ICON Motorsports

1st & 3rd

 

The easiest way by far I've found to make a CCC Diesel is to create a vaccum leak, that would be an easy and already nessicary starting point.

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1984 WS6 Hardtop Trans Am
Former L69 Car under restoration
1984 T-top Trans Am
4-bolt main 350, performer intake, headers, Holley 650, T-5, hayes clutch, dual elec. fans and 3.23's.
Daily driver and restoration
13.98 @ 101

 

BTTT