Question about 1988 Chevrolet S-10

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Trouble starting When i try to start my 89 S10 4.3 it turns over for 5 or 6 seconds before it spays fuel into the throttle body. What would cause this?

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I'm thinking a leak in a fuel line or gas tank it should stay pressured up until next start if it is doing that I would look for a "pin" leak do you smell gas at all?

Posted on Dec 27, 2008


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1 Answer

Whats the fuel presure supposed to be

Depends on engine type and tune. Early Throttle body injection was 11 to 13 psi and later 18 to 24 psi.
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89 dodge d150 318 tbi turn key to on position gas pours out of injection and fills throttle body in seconds I'm wondering is this absolute proof of complete failure of fuel pressure regulator failure?

89 dodge TBI system - that is NOT proof of the Pressure Regulator failing.
The fuel system will pulse on when the key is turned on to charge the fuel rail for starting. The injector should not leak - probable injector failure (stuck open) - try disconnecting the wiring to the injector (to rule out computer controls) and see if it still leaks with just Key-On. If it still does you can also tap the throttle body case where the injector is - if it stops - definitely the injector (don't damage the throttle body - lightly tap )
You may want to retrieve fault codes before you try disconnecting things and creating new faults. If you don't have a code reader - try Key On - Off - On - Off - On (without cranking) and count the flashes of the engine lite - all two digit codes - usually starts with code 12 (battery disconnected recently) and ending with 55 (end of tests)

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92 Camero SOMETIMES wont start, backfires or starts rough - but will run fine after it DOES start

I would want to know if it is ignition or fuel for sure. There are a few things you can try to narrow down the possible cause.
What does the cap and rotor look like, and is the spark a strong blue when it is running rough ?
Have you checked the actual fuel pressure with a gauge ? Does it matter if you spray carb cleaner or starting fluid into the throttle body ?
Any trouble codes stored in the computer ?
Its possible the coolant temp sensor is wrong and the computer thinks the air temp is 90 degrees instead of say 20 degrees. Or there is moisture in the dist cap or on the plug wires, and so on.

Feb 10, 2014 | Cars & Trucks

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My 1995 Taurus stalled yesterday while I was driving. It has not started again. It turns over, but won't start.

Well we find out is it an electrical or fuel related problem. Spay some starting fluid in the breather or throttle body for 3 seconds.. if it starts and go dead it is fuel related. and the fuel pump needs to be replaced. If not it is electrical and we will need to do some more testing

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My 1996 crown vic will not start motos turns over and trys to start but wont I have replaced intake manifold spark pulgs. motor has spark

basics,,,air,,fuel,,spark,,compression,,timing,,,pull a few plugs,,smell them for fuel,,if dry,,,take snorkel off throttle body,, open throttle body or flap half way,,spay a little starting fluid or injector spay into throttle put the snorkel back on see if motor fires up,,if so then ck fuel delivery & pressure,,,,hope it helped

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94 camary will crank but want start,could this be my fuel pump is bad

could be a couple of things first check for spark then fuel the easy way to check if its getting fuel o r not spay some starting fluid in the throttle body and try starting it

May 14, 2010 | 1994 Toyota Camry

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I have a 97 Blazer, just had the fuel pump replaced and worked fine. But in the cold weather it won't start. Any tips?

Try energizing the fuel line twice, turn the ignition key to the on position for 30 seconds then turning it off for 5 seconds and then try starting the engine. This will warm up and clean the MAF sensor, and also ressurize the fuel line if the fuel pressure check valve has failed and that is located on the fuel pump return line. Clean the MAF sensor will also help in the cod weather starts, so you may want to clean the MAF with MAF cleaner and clean the Throttle body with throttle body cleaner and pay attention to the Idle Air control valve passage ways at the back of the throttle body opening. Good luck and keep me posted.

Dec 09, 2009 | 1997 Chevrolet Blazer

2 Answers

05 silverado turns over wont start though jus repaced the fuel pump and still nothing spayed starting fluid domn it and runs for 10 to 15 seconds any suggestions

If starter fluid fires it up then your problem is still in the fuel system. You've already tested the throttle intake so move to fuel filter(s) next. Most cars with fuel filter problems will usually start or at least try to start but not necessarily. Next, disconnect the fuel line from the new pump and pump some gas into a glass jar. Filter that jar through a coffee filter and see if your fuel tank is dirty. This also seems unlikely because the truck is only an '05 but it is possible. You'll at least know whether your new pump is working right. I get a lot more new parts, that are no good, than you'd think possible. Next, check your fuel lines for kinks or other irregularities. The problem is almost definately in the fuel delivery system and not the throttle body/injector/carb and hopefully one of these will find it.

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My 89' S10 will turn over but not crank?

I would check and see if this is your fuel pump. Spray starting fluid in the throttle body right underneath the air horn and if its starts it's your fuel pump. Try turning your key three times but do not start it the first two times and your third time let it cycle for a second then turn the key to start. If it starts during one of these tests it's your fuel pump. Of course check battery and cables, plugs and wires, fuel in the tank, and starter. Autozone offers free tests on your electrical system. I hope this works for you!

May 20, 2009 | 1989 Chevrolet S-10 Blazer

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