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Author Topic: TPI onto 86 Block  (Read 116067 times)

Offline 123 pugsy

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Re: TPI onto 86 Block
« Reply #105 on: September 25, 2007, 05:32:16 pm »
Test Drive:
Seems to be running smoother than before but still rough. :-\ The idle drops down at a red light and feels like its going to stall. No brum,brum. More like ba  ba   ba  ba  ba  ba . It has very little power but cruises along not bad but a little shaky when I get going. Speedo is not working so I imagine the VSS is also not working? Maybe its spinning,not sure.

Ah, the pleasures of modern technology...... ::)
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Pugsy
76 C10 LWB
TPI 350

Offline VileZambonie

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Re: TPI onto 86 Block
« Reply #106 on: September 25, 2007, 10:30:03 pm »
Did you check your fuel pressure? Do you have a scan tool?
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Offline 123 pugsy

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Re: TPI onto 86 Block
« Reply #107 on: September 26, 2007, 05:00:39 am »
Quote from: VileZambonie on September 25, 2007, 10:30:03 pm
Did you check your fuel pressure? Do you have a scan tool?

No to both. I have to pick up a fuel pressure tool or guage.
I was thinking to get a guage that I can leave on there. Is there such a thing?
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Pugsy
76 C10 LWB
TPI 350

Offline Captkaos

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Re: TPI onto 86 Block
« Reply #108 on: September 26, 2007, 09:38:36 am »
Fuel Gauge: Bottom of this page, it mounts where the gauge hooks up normally.  http://hotrodlane.cc/08%20catalog/page%2062.pdf

Did you wire in a light to the diagnotics (psuedo Check engine light)?
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Offline 123 pugsy

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Re: TPI onto 86 Block
« Reply #109 on: September 26, 2007, 01:22:28 pm »
Quote from: Captkaos on September 26, 2007, 09:38:36 am
Fuel Gauge: Bottom of this page, it mounts where the gauge hooks up normally.  http://hotrodlane.cc/08%20catalog/page%2062.pdf

Did you wire in a light to the diagnotics (psuedo Check engine light)?


That guage looks perfect.Can read it anytime.
I installed a light in the dash behind my "Choke" lens. It is working and giving no codes. Just flashing 12.
No code after I set the timing either. Also, I have no EGR solenoid or EGR hooked up/working and no code up for these either.
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Pugsy
76 C10 LWB
TPI 350

Offline VileZambonie

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Re: TPI onto 86 Block
« Reply #110 on: September 26, 2007, 01:36:47 pm »
You can get an inexpensive set of gauges from autozone or advance etc...
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Offline CruzinHigh

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Re: TPI onto 86 Block
« Reply #111 on: September 28, 2007, 06:58:48 pm »
What happens when you punch it hard?  I mean lay into it... Does it stumble really hard?

For sure, you gotta get a PSI gauge on it and leave it hooked up for good, (throughout the remainder of the troubleshooting process).  If you can watch it in the cab during a drive even better.

When I put my TPI back together last time I had a vaccum leak on the runners.  It made it run awful.  It set a fault too, but led me down the path of misdiagnosis trying to blame the MAF instead.  If I am not mistaken you are speed density so MAF isn't an issue but just trying to illustrate a point.

How many lb. injectors are you running? Is it a stock setup from a 350 TPI originally?  If you've modded the cam and gone with more flow inside that motor the stock donor 350 fuel pump won't keep up either.  Need at least a 255 liter per hour.  (If I'd read every shred of the post here I am sure you've addressed this already so my apologies if being redundant).

How far is that O2 sensor from the headers?  If it is too far, you'll need a heated 02 possibly if it doesn't get hot enough.  Does it smoke black or anything else odd?   



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Offline 123 pugsy

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Re: TPI onto 86 Block
« Reply #112 on: September 29, 2007, 08:09:30 am »
I did a key on engine off test on the fuel pressure. 40PSI.
O2 is about 4" behind pass side exhaust manifold.

Can't say anymore as the wife is in labour. She's rushing me out the door.

Pugsy
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Pugsy
76 C10 LWB
TPI 350

Offline Bitzer!

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Re: TPI onto 86 Block
« Reply #113 on: September 29, 2007, 10:20:55 am »

Good luck with the Missus m8   ;)
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Offline 123 pugsy

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Re: TPI onto 86 Block
« Reply #114 on: September 30, 2007, 05:53:30 pm »
Quote from: CruzinHigh on September 28, 2007, 06:58:48 pm
What happens when you punch it hard?  I mean lay into it... Does it stumble really hard?
How far is that O2 sensor from the headers?  If it is too far, you'll need a heated 02 possibly if it doesn't get hot enough.  Does it smoke black or anything else odd?   

When I punch it hard it doesn't stumble,it just goes like a Honda Civic up a steep grade. It feels like it has no power. I have brand new plugs,cap.rotor,wires.

Like I said above the O2 sensor is about 4" behind the passenger side exhaust manifold.

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Pugsy
76 C10 LWB
TPI 350

Offline 123 pugsy

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Re: TPI onto 86 Block
« Reply #115 on: September 30, 2007, 06:32:56 pm »
Quote from: CruzinHigh on September 28, 2007, 06:58:48 pm
How many lb. injectors are you running? Is it a stock setup from a 350 TPI originally?  If you've modded the cam and gone with more flow inside that motor the stock donor 350 fuel pump won't keep up either.  Need at least a 255 liter per hour.  (If I'd read every shred of the post here I am sure you've addressed this already so my apologies if being redundant).

It doesn't smoke black or anything. I've got a stock set up from a 92 Firebird. The fuel pump should be OK as its brand new. Its the one for the 92 Firebird.

I just checked it. 40 PSI with the key on and engine off. It was 36 PSI with a rapidly bouncing needle when I started it up.
 
I've got an RV cam in it and I was checking  on Summit's web site and the specs say its not computer compatible. ??? ???

http://store.summitracing.com/partdetail.asp?part=CCA-K12-206-2&autoview=sku
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Pugsy
76 C10 LWB
TPI 350

Offline VileZambonie

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Re: TPI onto 86 Block
« Reply #116 on: September 30, 2007, 07:59:56 pm »
That cam will be fine so don't sweat it.

Your fuel pressure should be 41.0 to 47.0 psi Key on engine off. If your engine is idling it should be -3.0 to -10.0 PSI less, when vacuum drops to zero it should jump back up. Pop the vacuum hose off itwhile it's idling and see if it jumps up. The bouncing needle on the gauge means either a problem with your gauge or you have a problem with an injector or leak. Try pinching off the return hose and see what happens. Does it hold pressure when you shut it off? Does it run better when the engine is cold?
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Offline 123 pugsy

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Re: TPI onto 86 Block
« Reply #117 on: October 04, 2007, 04:32:20 pm »
When I say the needle is fluctuating, its very little, probably the pulsations from the fuel pump.

Its at 45 PSI with the vac disconnected from the FPR.
It holds pressure when I shut it down. It appears to be functioning properly.

I'm wondering if not having the EGR solenoid and EGR not being hooked up would cause the rough running?

Vacuum is at 14" hg. If I advance the timing, it cannot reach 18-22". It comes up and then drops down again. It can hit 20" at about 2800 RPM.
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Pugsy
76 C10 LWB
TPI 350

Offline VileZambonie

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Re: TPI onto 86 Block
« Reply #118 on: October 04, 2007, 09:30:18 pm »
Did you adjust your rockers too tight?

It's not the EGR solenoid not being there. Is there an EGR valve?


Start checking your sensors one at a time. Get your digital volt meter ready and a few paper clips and I'll walk you through each one. Maybe start with the TPS.
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Offline 123 pugsy

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Re: TPI onto 86 Block
« Reply #119 on: October 05, 2007, 05:02:37 am »
There is an EGR valve, its just not hooked up right now as I don't have the solenoid. Should I just give it some full vacuum or leave it unhooked?

The rockers are not too tight. One is actually a bit loose with a slight tick.

« Last Edit: October 05, 2007, 10:12:20 am by 123 pugsy »
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Pugsy
76 C10 LWB
TPI 350
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