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Offline Steve Wood

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Re: Stumped
« Reply #30 on: July 01 2016, 02:08:28 PM »
Would not be surprised
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Offline larrym

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Stumped
« Reply #31 on: July 01 2016, 04:10:01 PM »
Ok I decided to reset the IAC by tripping the ALDL port and setting my base RPM. I got the rpm down as low as 475 and set it at 525 reset the TPS and fired it up hmm idles good IAC is at 25 TPS is at .43. Shut it down tighten everything up and fire it up goes super lean rpm is low WTF look at the IAC it's at 175 .... So its trying to bring the RPM up but I guess there is not enough fuel there to do it?
Shut it down fire it up and it's fine, try it a half a dozen times and it's good 5 out of 6 but every once in a while The IAC goes mental.
Am I correct in thinking that the fueling is not right on the odd occasion it goes mental or could it be the IAC?
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86 white T type with t tops and blackout trim. 60lb injectors Gen 2 with Extender Chip TR6 ignition 212/206 roller cam Turbonetics BB CPT 61 CAS V4 Intercooler Cobbled together Alky Injection 4 inch MAF pipe with integral sensor
2800 stall lots of fun with a little 6 banger!
Best ET 11.36

Offline Just a Six?

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Re: Stumped
« Reply #32 on: July 02 2016, 09:00:12 AM »
Larry over the last 4-5 years my IAC will act normal most of the time & then do like yours & read really high & I've swapped/cleaned a couple of them. One thing is my idle stays about the same no matter what it reads so in my case I don't pay much attention to it. If yours is good 5 of 6 times maybe drive it for a while & see how it acts after a couple weeks?   

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David
87 LTD. Purchased May 88
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The sticker on AC shows a V-8 Carb car. Special order by Mr. Nick Hall VP of GM Canada
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Offline larrym

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Stumped
« Reply #33 on: July 02 2016, 09:54:12 AM »
When it acts up its not really drivable. I am able to watch what is going on in the MAF translator air flow in is typically at 6g on the translator hz in is 1800 hz out is 39 and rpm is around 850 IAC is at 25.
When it loses its mind air flow in is 10-11g hz in is 2100-2200 hz out is 39 rpm is about 700 IAC is 175.  Some thing is very a miss.
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86 white T type with t tops and blackout trim. 60lb injectors Gen 2 with Extender Chip TR6 ignition 212/206 roller cam Turbonetics BB CPT 61 CAS V4 Intercooler Cobbled together Alky Injection 4 inch MAF pipe with integral sensor
2800 stall lots of fun with a little 6 banger!
Best ET 11.36

Offline Just a Six?

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Re: Stumped
« Reply #34 on: July 02 2016, 01:02:55 PM »
The only time my car acted somewhat similar to your kind of erratic readings with some popping & farting was when my stock MAF sensor was having a slow death. Probably not much help for your problem. I hope you get it sorted out because that kind of stuff makes me Nuts!  :icon_eyes:
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David
87 LTD. Purchased May 88
Doeskin leather, coach lites without Landau Roof, moon roof, carpeted trunk & No Factory Hood Ornament!
The sticker on AC shows a V-8 Carb car. Special order by Mr. Nick Hall VP of GM Canada
Runs 11.50 on 21 lbs with my old style 67 Q Trim & Alchy

Offline larrym

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Stumped
« Reply #35 on: July 02 2016, 01:11:12 PM »
I'm leaning towards a translator issue
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86 white T type with t tops and blackout trim. 60lb injectors Gen 2 with Extender Chip TR6 ignition 212/206 roller cam Turbonetics BB CPT 61 CAS V4 Intercooler Cobbled together Alky Injection 4 inch MAF pipe with integral sensor
2800 stall lots of fun with a little 6 banger!
Best ET 11.36

Offline Pyro6

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Re: Stumped
« Reply #36 on: July 02 2016, 01:18:21 PM »
Did you consider a blocked exhaust. Do you still run a cat? In the old days we used to have double wall pipes separate and crimp the inner wall shut, not on GN's but mostly Chev's. The way your car is behaving reminds me of that, especially with only 12" vacuum.
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Offline larrym

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Stumped
« Reply #37 on: July 02 2016, 01:46:29 PM »
It's a 3" single shot and I tested the vacuum again it's up now to18 tested with a different gauge
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86 white T type with t tops and blackout trim. 60lb injectors Gen 2 with Extender Chip TR6 ignition 212/206 roller cam Turbonetics BB CPT 61 CAS V4 Intercooler Cobbled together Alky Injection 4 inch MAF pipe with integral sensor
2800 stall lots of fun with a little 6 banger!
Best ET 11.36

Offline larrym

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Stumped
« Reply #38 on: July 03 2016, 08:37:04 PM »
So swapped in my buddies translator and TT chip purred like a kitten....
BLM was good IAC was good.
Reinstalled mine and was reattaching it to the dash it dies. My buddy tugs on each wire on the connector and duplicates the symptom twice. Looks like I need the connector repined we tightened them as best we could with a pick but I'm going to get the pin tool and take it apart add new connectors on the plug see if that smartens it up. 
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86 white T type with t tops and blackout trim. 60lb injectors Gen 2 with Extender Chip TR6 ignition 212/206 roller cam Turbonetics BB CPT 61 CAS V4 Intercooler Cobbled together Alky Injection 4 inch MAF pipe with integral sensor
2800 stall lots of fun with a little 6 banger!
Best ET 11.36

Offline good2win22

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Re: Stumped
« Reply #39 on: July 03 2016, 10:45:43 PM »
Good find Larry!
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Jason

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Offline Steve Wood

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Re: Stumped
« Reply #40 on: July 03 2016, 11:16:26 PM »
 :cheers: :cheers:
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Steve Wood

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A lot of broken parts does not make you a racer; it makes you a slow learner.

Offline Just a Six?

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Re: Stumped
« Reply #41 on: July 04 2016, 02:45:24 PM »
It`s so nice to you find little Gremlins like that before they drive you borderline insane!   :rock:











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David
87 LTD. Purchased May 88
Doeskin leather, coach lites without Landau Roof, moon roof, carpeted trunk & No Factory Hood Ornament!
The sticker on AC shows a V-8 Carb car. Special order by Mr. Nick Hall VP of GM Canada
Runs 11.50 on 21 lbs with my old style 67 Q Trim & Alchy

Offline larrym

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Stumped
« Reply #42 on: July 04 2016, 04:57:06 PM »
I'm beyond borderline with this one.
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86 white T type with t tops and blackout trim. 60lb injectors Gen 2 with Extender Chip TR6 ignition 212/206 roller cam Turbonetics BB CPT 61 CAS V4 Intercooler Cobbled together Alky Injection 4 inch MAF pipe with integral sensor
2800 stall lots of fun with a little 6 banger!
Best ET 11.36

Offline larrym

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Stumped
« Reply #43 on: July 13 2016, 10:28:48 PM »
So I got a regular translator installed tonight borrowed a chip and I'm back. Now I gotta tune it all over again
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86 white T type with t tops and blackout trim. 60lb injectors Gen 2 with Extender Chip TR6 ignition 212/206 roller cam Turbonetics BB CPT 61 CAS V4 Intercooler Cobbled together Alky Injection 4 inch MAF pipe with integral sensor
2800 stall lots of fun with a little 6 banger!
Best ET 11.36

Offline Scoobum

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Re: Stumped
« Reply #44 on: July 13 2016, 11:03:14 PM »
What chip?
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