90 Lx 5.0 Rebuild

dwb · Oct 15, 2017

I was looking over the American muscle site on injectors and they had 24# injectors rated to 358HP. Might not be rwhp but figured I would hope I would be closer to 400 after dropping a super in it so 30# were listed as 448. Can't say right now I have an end game. Just wanted to build a top end that could support a supercharger without having to redo the deeper guts.

General karthief · Oct 15, 2017

Swap'n a set of injectors is not much harder than an oil change

dwb · Oct 20, 2017

Installed the new injectors & mass air meter and now I'm having issues going over 3500 rpm. Engine Cuts power.

Did some reading here.. think if she worked fine before the latest change I could need a new TFI module?

dwb · Oct 20, 2017

Oh I also got a bama 4-Bank eliminator chip I haven't installed. I know some say they crap but worth trying it to see if it corrects this issue?

General karthief · Oct 20, 2017

Thats a good way to create more problems, fix it first then try the chip.
Have you checked for codes?

dwb · Oct 20, 2017

Just ran the KOEO

51, 23, 31, 67

23 & 67 are new

I deleted the EGR so 31 is explainable.

dwb · Oct 20, 2017

Don't think I added in the first post about the power failure after 3500. It idles like crap. Up and down from like 700 rpm to 1100rpm some times sounding like it's about to stall out so thought my throttle body wasn't open enough for idle so opened it a bit with the set screw but not sure I needed to as it was fine before

dwb · Oct 20, 2017

I'll go push clutch in when dumping codes. Might be why I got a 67. But nothing else in those codes to explain the 3500 power kill

General karthief · Oct 20, 2017

So you had problems reving past 3500 right from the begining?

dwb · Oct 20, 2017

No not at all. Everything was fine my only issues was timing causing lean issue and heating up the headers to glow.

So adjusted timing. And temp went down. Ran way better.

Put in new MAS and Fuel injectors. Idles rough, bounces on and off from 700 to 1000/1100 and almost sounds like it wants to stall out.

When I drive it in first gear over 3000-3500 power cuts out. When I go into second gear and get towards the 3000,3500 mark it gives out.

dwb · Oct 20, 2017

In neutral reving it up is fine

General karthief · Oct 20, 2017

Go back to the old injectors and maf.
Question: did you reset the computer after changing the injectors and maf? And check your fuel pressure too,

dwb · Oct 20, 2017

No didn't do anything with computer or anything.

Put in injectors and MAF and fired it up.

I will check fuel pressure

JD1964 · Oct 20, 2017

Are you running a filter on the end of the MAF? Silly question maybe but I tried running mine without a filter on a test drive and it sputtered out early like you describe. If you are running a filter, try rotating the MAF to a different clock position. They're finicky like that sometimes.

dwb · Oct 20, 2017

No filter. I noticed the stock MAF housing had a screen type filter on it but this BBK had nothing

General karthief · Oct 20, 2017

Your running it with no fiter at all?

dwb · Oct 20, 2017

Like.. just the MAF housing? No..

I have BBK cold air intake. So filter on the end of the intake... I didn't think this pos MAF needed its own filter if it didn't come with one

JD1964 · Oct 20, 2017

Mine wouldn’t run right without the filter installed. It has to do with the way the filter breaks up and balances the airflow right before it goes though the maf.

JD1964 · Oct 20, 2017

If you have a filter mounted on end of the air tube you’re good there. That’s what I meant. Try clocking the maf 90 degrees and see if it helps.

Is the maf and injectors rated the same? What lb?

dwb · Oct 20, 2017

Yeah same rating. 30lbs.

The old MAF tube. Like stock has a screen type filter on it. Just the BBK didn't. I thought why would stock and not this but didn't think anything and put her in. I'll see what I can find to use for a filter.

90 Lx 5.0 Rebuild

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wonder how much it would cost to ship you a pair

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wonder how much it would cost to ship you a pair

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wonder how much it would cost to ship you a pair

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wonder how much it would cost to ship you a pair

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there is enough sticking out to grab on to

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wonder how much it would cost to ship you a pair

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there is enough sticking out to grab on to

there is enough sticking out to grab on to

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