82 ASI shuts off when hot

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fiftybuckbunny
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82 ASI shuts off when hot

Post by fiftybuckbunny » Mon Jun 29, 2015 5:23 pm

Ok, 82 van, shuts off and will not restart when hot. Good spark, good compression, fuel psi spot on. Grounds etc just cleaned. New temp 2. I'm stumped. Been working on these for years and this one has me flummoxed. Can't drive it at all. Engine ran great in the other van it was in. Cold start fine but hot it won't go.

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lilpig88
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Re: 82 ASI shuts off when hot

Post by lilpig88 » Mon Jun 29, 2015 9:17 pm

Could you give us a few more details?

What have you checked or not checked or tested or noticed...
How does it "shut off when hot" (slowly, suddenly, etc.) ?

Try to give us a little more information so we can begin thinking through more options.
"Engine ran great in the other van it was in." Is this a recent swap or have you many years with the current setup?

cheers,
Andrew

fiftybuckbunny
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Re: 82 ASI shuts off when hot

Post by fiftybuckbunny » Tue Jun 30, 2015 5:30 am

This is a 2.0 I built years ago, was in a van as a daily driver till I wrecked it. Mostly stock but a mild Scat cam and solid lifters on CA spec FI, now running 49 state FI. It starts great cold, and I can let it idle for quite a while, 15 20 mins but when I go to drive it has no power, shuts off and won't restart. Checked spark and strong, pull injectors out and I have fuel when cranking. Old temp two was out of spec so a new one. It is a sudden stop and you can crank it but no go. Rebuilt AFM that I got years ago I didn't need. Not sure which sensor to check at this point. I'll bring home a comp gauge and check that. Fuel psi is good at 30 but haven't checked flow rate. It holds pressure for hours. All I can think of right now. Thanks in advance

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Amskeptic
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Re: 82 ASI shuts off when hot

Post by Amskeptic » Tue Jun 30, 2015 9:05 am

fiftybuckbunny wrote:This is a 2.0 I built years ago, was in a van as a daily driver till I wrecked it. Mostly stock but a mild Scat cam and solid lifters on CA spec FI, now running 49 state FI. It starts great cold, and I can let it idle for quite a while, 15 20 mins but when I go to drive it has no power, shuts off and won't restart. Checked spark and strong, pull injectors out and I have fuel when cranking. Old temp two was out of spec so a new one. It is a sudden stop and you can crank it but no go. Rebuilt AFM that I got years ago I didn't need. Not sure which sensor to check at this point. I'll bring home a comp gauge and check that. Fuel psi is good at 30 but haven't checked flow rate. It holds pressure for hours. All I can think of right now. Thanks in advance
Be attuned to temperature-related issues:
coil
ignition module (if not breaker points)
TS II (new or old, check it warm)
afm/ecu connector (look at fingers in plug for dislodged terminal)
Colin
BobD - 78 Bus . . . 112,730 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles

fiftybuckbunny
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Re: 82 ASI shuts off when hot

Post by fiftybuckbunny » Sun Jul 05, 2015 10:58 am

Did some more tests and running it till it does something.

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SlowLane
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Re: 82 ASI shuts off when hot

Post by SlowLane » Mon Jul 06, 2015 5:12 pm

15-20 minutes of idle isn't what I'd call "hot". Warm, perhaps.

Have you checked your AAR elbow and connections for leaks?
'81 Canadian Westfalia (2.0L, manual), now Californiated

"They say a little knowledge is a dangerous thing, but it is not one half so bad as a lot of ignorance."
- Terry Pratchett

cegammel
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Re: 82 ASI shuts off when hot

Post by cegammel » Mon Jul 06, 2015 5:22 pm

I certainly don't want to send you on an expensive rabbit chase, but my double relay / fuel pump relay caused a similar issue before crapping out completely. It supposedly can be checked, but should be tested when intermittently not working, of course... My limited multimeter skill limited my testing, but a replacement solved my issues.

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