eighty_six_720

alright I'll give that a shot in the morning

okay so do you think the EGR could be causing it to run lean and with the heater disconnected its running rich which is cancelling it out? because If I'm right about what the EGR is then the piece that it was bolted to was pretty corroded.

so today I disconnected all the electronics including the choke and took it for a spin and it seemed to run just fine. Any Idea why that would be? or is it just a coincidence?

it certainly does sound like that EGR could be the issue so thats the first thing I'll check. Though strange part is that it randomly decides that it wants to work it doesnt seem to matter if its hot or cold. And when this problem is happening its a major issue like 40 mph top speed sometimes 30 if I'm going up even a slight grade, So Its not been freeway worthy in a while. I was told by some people it could be the secondary not opening in the carb but those were just guesses.

I'll check out the choke tomorrow as well as the EGR which sounds like it could definitely be the problem. I've definitely got some electrical/timing issues but because this seems like its an on/off problem so I'm not sure thats whats causing this piece of the problem. But then again I'm no expert so just tell me if I'm wrong. Thanks for all the responses!

haha yeah its rougher than it looks right now after thrashing it in the desert. I do have the electric choke but I have no idea whether its adjusted correctly. It does tick when the key is turned to on so it works but could that be whats causing all this?

I put a brand new filter in after I found all that crap in the bowl but no dice

So I've been having what I'm fairly certain is some carburetor woes over the past few months and I was hoping you guys could shed a little light on the situation. It'll start up and idle just fine and even when I rev it up everything sounds fine but when I'm driving its very sluggish and starts popping and backfiring when it hits around 3000 rpm, sounding like It's starved of fuel, however after driving for maybe a half hour or so itll run fine until I stop and then Itll act up again. I took the carb off and installed a rebuild kit and removed a fair amount of silt from the bowl and when I took it for a test drive it ran better than it ever had for a little while but as soon as I stopped at a red light and took off again It was back to its old ways. I've been searching around the internet and havent really found much so any help would be appreciated. thanks. Here's the truck as it sits today

I see. Didn't really think that one through huh? I didn't get much done today anyways ill check again using some of your guys advice tomorrow.

No I set it on a piece of sheet metal I had laying around and saw a whole lotta nothin. But I'll for sure swap the could around and try that before I do anything.

I took out all the plugs an it looks like the exhaust side isn't firing. I replaced the fuse on the far left but still nothin. My guess is the distributer

Thanks for all the responses guys I appreciate it. I've been having fuel system issues since I bought it so it could be the pump or the filter I dropped the tank a while back to clean it so it doesn't seem likely that it would be a clogged filter. Ill check both after school tomorrow. And I have been monitoring water levels and all seems well in that arena so hopefully that rules out head gasket. It is the carbureted z24 so it sounds like it might be timing. Might sound like a stupid question but how do I make sure the timing is lined up once I take off the valve cover? On top of all this there's a sort of hissing/whistling sound at freeway speeds if that means anything.

So last weekend I drove the new truck out to to my buddies house in the desert (at night) and going up through the mountains the truck was getting a little too hot, about 3/4 of the way up the temp gauge. I pulled over for a while and waited for it to cool down and once out of the mountains everything seemed fine. On the way home however(at night again) the truck seemed sluggish and would get too hot too frequently to the point where the headers were glowing red and I was stopping every fifty or so miles. Now that I'm back the truck seems sluggish and hesitates and backfires every time I step on the throttle. Any help would be appreciated. Here's the truck if anyone's interested

So I'm trying to bleed the system right now with my friend what's the best way I Go about doing this?

Alright awesome thanks a lot. Ill give all this stuff a whirl tomorrow. Thanks again guys.