It Won't Start

[SuperHatch]

The stock tube was too long and pushed the filter out over the fender so I've got the MAF duct taped to the TB. It's on there pretty securely and I don't *think* it has any leaks, but it's a possibility. It could also be because I don't have the hose that goes to the IACV hooked into the intake and it's taking in free air that isn't metered which could screw some things up. I guess I should get a new shorter intake tube and hook that line up before spending a bunch of money on a new MAF.

The 2k is idle is an actual 2k not per the tach. The tach read more like 3k, but I bought a timing light with an RPM gauge on it and just left it hooked up to the #1 plug.

Honestly, you might have the MAF too close to the throttle body. The MAD needs to be a good distance from the vacuum source to allow the flow to become uniform throughout the intake pipe. If you have it too close to the throttle body, the air can actually be pulled around the hot wire causing incorrect MAF readings.

I'm not denying the possibility that you have a bad MAF either.

[tmorgan4]

That isn't something that had even occured to me. Makes perfect sense though. I'm getting an aluminum intake tube TIGed up as we speak so I'll have to try it again once that's installed.

[SuperHatch]

That isn't something that had even occured to me. Makes perfect sense though. I'm getting an aluminum intake tube TIGed up as we speak so I'll have to try it again once that's installed.

One other thing... if your MAF is directly taped to the throttle body. Where is your IACV pulling it's air from?

[tmorgan4]

One other thing... if your MAF is directly taped to the throttle body. Where is your IACV pulling it's air from?

Quite observant. The IACV was pulling in un-metered air (not hooked up) which I'm sure could cause some of these problems I'm having. Without the MAF plugged in it idles steady but rough. Shakes like a Harley. I guess I should probably get the whole air intake hooked up before I make too many assumptions that something is broken.

I had the intake tube TIGed up but he didn't have enough time to put in the IACV fitting.

[SuperHatch]

Quite observant. The IACV was pulling in un-metered air (not hooked up) which I'm sure could cause some of these problems I'm having. Without the MAF plugged in it idles steady but rough. Shakes like a Harley. I guess I should probably get the whole air intake hooked up before I make too many assumptions that something is broken.

I had the intake tube TIGed up but he didn't have enough time to put in the IACV fitting.

That will absolutely cause your problem. When the engine attempts to idle, the overwhelming majority of the air it is using to idle is pulled though the IACV and a very very small percentage comes through the leakage around the throttle plate. If you are pulling all unmetered air through the IACV, the ECU will see a very small percentage of the actual air that is entering your engine. This would result in, as you have observed, low IDC's because the ECU simply doesn't see much air getting sucked in.

I honestly think that once you get that issue fixed, the car will idle.

Good luck!

[tmorgan4]

Thanks Steve! Couldn't have done this build without all the support from this forum. I'll get that hooked up tomorrow and hope that solves my issues!

[T45]

Your truck will never run right anymore. I'll swing by and pick it up and tow it to the junkyard for you if you like.

[tmorgan4]

I'm about ready to take you up on that. I had a small leak in the oil pan where I cut off the bulge so I got to pull the oil pan off for the 3rd time. This is really getting old!

[T45]

Yeah my pan isn't right either. I figure after I get it on the road and all the other bugs worked out I'll start fabbing #2 up. The city was on me for having the Z in the driveway so I had to rush the pan. I haven't welded much sheet metal and ended up welding it too fast. Mucho calore. The whole flange warped and even though I got it to seal decent it's just not right.

Oh well, if that's the only thing wrong with it after all this work then I'll be more than happy to make another one! lol Hey, u still have those injectors? Email me. I just changed jobs so money's been tight but if you still got em' I'll take them when I get paid.

Not to thread jack but speaking of my new job... I work for a hydraulic hose company. I get to make up all my a/c hoses for next to nothing! lol Oh, and we have a lathe in the shop too. Gotta love fringes!

[craigztoyz]

I want to weld my pan while on the engine, using a welding blanket inside to catch anything that tries to fly in. That way it should not get warped, but that is hard to do that close to the flange.