C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

no start C4

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Old Jan 1, 2009 | 01:12 PM
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Default no start C4

Hi, everyone hope you had great hoilday, my 89 c4 coupe will not start,cranks but no start, replaced wires & plugs, fuel filter & tested fuel pump. can someone give me other opptions on problem. thanks jr917
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Old Jan 1, 2009 | 02:00 PM
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Basics..
What did you do to make it NOT run...start there.

Shoot a little starting fluid in the throttle body, if it fires you have spark. If it doesn't then you should look at your ignition.

Fuel and spark at the right time is all you need just like an older engine.
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Old Jan 1, 2009 | 02:29 PM
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Thanks, will try & get back
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Old Jan 2, 2009 | 10:13 AM
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Did you test both injector fuses ??
Is there spark ??

http://members.shaw.ca/corvette86/En...ButWontRun.pdf
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Old Jan 5, 2009 | 07:14 PM
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Tried the starter fluid,it started and turned off when reattached flex duct, thanks iroc57
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Old Jan 5, 2009 | 07:15 PM
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Yes there is spark, thanks for link
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Old Jan 5, 2009 | 07:30 PM
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How about those injector fuses ??
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Old Jan 6, 2009 | 09:02 AM
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Originally Posted by jr917
Tried the starter fluid,it started and turned off when reattached flex duct, thanks iroc57
Sounds like you have a fuel delivery problem....could be a few things going on check the injector fuses as suggested. If fuses are good you may want to do some fuel pressure checks (you'll need a fuel pressure gage for this) at the fuel rail. If all the pressure check check out and you have injector pulses it may be injector time......the stock Multecs injectors are a problem in a lot these '89s might be your issue here too. I'm also located here in Tampa.....If you get stuck or need help with car--I'm in the area.
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Old Jan 6, 2009 | 03:42 PM
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Originally Posted by jr917
Tried the starter fluid,it started and turned off when reattached flex duct, thanks iroc57
Next check the fuses that 87 mentioned then fuel pressure at the rail. There is a schrader valve to put a guage on.
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Old Jan 6, 2009 | 09:21 PM
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Starting Fluid is for trucks good way to screw up your engine.
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Old Jan 7, 2009 | 09:09 PM
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Default '89 starting trouble

My '89 convertible has a similiar starting problem. It will occassionally not start after it is shut off. If I spray starting fluid in the plenium, it cranks and runs until the next time. It some times goes days before it doesn't crank again. I have changed the fuel pump and fuel filter, but has not solved the problem. Can someone help me with solving the root cause of the problem.
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Old Jan 7, 2009 | 09:12 PM
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Originally Posted by jstewp
My '89 convertible has a similiar starting problem. It will occassionally not start after it is shut off. If I spray starting fluid in the plenium, it cranks and runs until the next time. It some times goes days before it doesn't crank again. I have changed the fuel pump and fuel filter, but has not solved the problem. Can someone help me with solving the root cause of the problem.
The stock Multec fuel injectors are a HUGE problem in '89 cars.
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Old Jan 7, 2009 | 09:12 PM
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Originally Posted by MR NICE
Starting Fluid is for trucks good way to screw up your engine.

What kind of truck?
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Old Jan 7, 2009 | 09:27 PM
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Is your suggestion to replace the injectors?
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Old Jan 7, 2009 | 09:37 PM
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Originally Posted by MR NICE
Starting Fluid is for trucks good way to screw up your engine.
ohm check the injectors. If the fuel pressure is there I bet 1 or two are at 10ohms or less. If any are dead shorted, the car won't start
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Old Jan 8, 2009 | 07:23 PM
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Thanks to all, checked fuses there good. tested fuel pressure at 42. I will try to ohm out the injectors. will not stop thanks.
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Old Jan 12, 2009 | 08:30 PM
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Originally Posted by FICINJECTORS
ohm check the injectors. If the fuel pressure is there I bet 1 or two are at 10ohms or less. If any are dead shorted, the car won't start
Thanks ohmed out injectors found 3 bad will need to get new ones can you give me an Idea on cost of the bosch III injectors thanks
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Old Jan 12, 2009 | 10:51 PM
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Jon has a good price going on the Bosch II at the moment

http://fuelinjectorconnection.com/sh...&productId=134
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Old Jan 12, 2009 | 10:56 PM
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Originally Posted by jr917
Thanks ohmed out injectors found 3 bad will need to get new ones can you give me an Idea on cost of the bosch III injectors thanks
those damm multecs! Pm sent
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Old Jan 13, 2009 | 02:53 AM
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Originally Posted by FICINJECTORS
those damm multecs!
Should keep you in business for a few years
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