My buddy has a 86 TA with a 305 TBI. Everytime he shuts it off, with the trans in park, and the engine hot, it diesels on anywhere from 3 seconds to 3 minutes at about 100rpm.
If he shuts the engine off with it in drive, the it shuts right down normally.

any ideas whats going on here??? thanks a ton for the help.

 

Try either retarding the timing some or running a higher-octane fuel.

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89 iroc-z 305 tbi
k&n filtercharger, open element air filter. nuffin' else

 

yup, I would have to agree, your timing is off.

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1992 Camaro Z-28 custom 25th anniversary, 5.7 TPI auto, 2.73 posi, t-tops, arctic white with 92' medium mettalic gray stripes with black border stripe.

1967 Pontiac Catalina 2 door fastback, 400 v-8, auto, cameo white, dark red interior

 

Your idle may be to high.

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383 86 Camaro Z28 ---1/4 mile et>13.65@103mph,,
10.5:1compression Dart Pro 1 Aluminum heads 215cc>2.05/1.60 valves,400 steel crank,cam specs:224/234 at 050 525/525 lift,3500 stall converter,shift kit,4.10 gears,770 Holley Avenger,Victor Jr. Intake,true dual exh,Hooker headers with 40 series Flowmasters,MSD Coil and Module.ALSO SECOND GEN Z28---mods:454 BBC,.546 max lift(doug herbert cam ) 750 Holley vac sec. ,Edelbrock Performer manifold,Holley electric fuel pump,Hooker headers,Flowmaster mufflers,beefed up 700r4 tranny, 3.90 gears, powertrax unit, B&M console shifter.

 

Carbon build up in the combustion chamber will help it along as well. Mist some water through the engine. Don't let it diesel very long, it's bad on the engine.

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350 with stealth intake, holley carb, 470 lift cam. 700r4 with .5 boost valve, vette servo, tci lock-up kit, B&M megashifter. Richmond 3.73 gears, powertrax locker, timkin bearings, synthetic lube. Custom 3 inch single into 2 2.5 pipes. 1 1/2 drop springs, 1 5/16 solid front sway bar, 1 inch rear bar, custom subframe connectors, custom LCA relocation brackets. Kobel ground FX, currant red metallic paint. Lots of other stuff...
82camaro

 

how would i mist water throught the engine?? i have heard of doing this but im not sure how.

 

No such thing as a 86 TA with TBI.

What is the engine from? Is it really TBI, or is it actually a carb (much more likely)?

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"So many Mustangs, so little time..."
ICON Motorsports

 

Must be a computer carb. Make sure the timing is correct and the idle speed is correct. That should fix it.

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89 Transam GTA, 350TPI, auto, 3.27 rear, dual cats, gray.
Magnaflow cat-back,
K&N open element,
Best E.T. 14.63@95mph

 

Hey RB....I'm unsure about the 86 TA's. My friend has an 86, and it has a TBI on top of it. He says it's never had an engine swap, and I know a TBI when I see one.

 

actually it is a carb, sorry about that, how do you do the water in the engine thing?