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  #1  
Old 04-21-2011, 01:11 PM
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Join Date: Apr 2011
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Default 89 ranger no spark or injector pulse

Ive got problems with an 89 ranger that has the 2.3L 4 cylinder with DES. I hit a large bump while driving and it died instantly. It has no spark and the injectors are not firing, but it does have fuel pressure and it turns over. The crank sensor has been checked and I also tried swapping the ecu with one from a 91 ranger with no luck. I am not positive if 89 and 91 ecu's are compatible, but the connectors were the same. What do I check next?

Last edited by swanson; 04-21-2011 at 06:44 PM.
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  #2  
Old 04-21-2011, 01:22 PM
Chrome Dont Get You Home
 
Join Date: Dec 2009
Posts: 1,169
Default Re: 89 rander no spark or injector pulse

check your timing it might have jumped do to the bump and check all your grounds
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1990 Ranger Extended Cab
2.9L V6 5 Speed Transmission
Planning to put a 347 and a T-5 in it eventually

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Originally Posted by FireRanger View Post
It looks like someone attacked the front of the truck with a bedazzler.
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  #3  
Old 04-21-2011, 01:34 PM
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Join Date: Feb 2010
Posts: 6,042
Default Re: 89 rander no spark or injector pulse

check the inertia switch under the dash on the passenger side footwell. it may have been triggered when you hit the bump. it will look something like this:

__________________
2001 Ranger 4x4 Stepside
-RCD Suspension lift
-33x12.5 BFG KM2's on Mickey Thomson classic locks
-4:56 gears
-Auburn gear LS
-James Duff traction bars
-Headers
-Flowmaster duals
-SCT X-Cal2 and some small exterior mods

http://www.cardomain.com/ride/2321189

2005 F-150 Lariat 4x4
-LED third brake light
-Weathertech floor liners
-Edge tuner
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  #4  
Old 04-23-2011, 07:00 AM
Chrome Dont Get You Home
 
Join Date: Dec 2009
Posts: 1,169
Default Re: 89 rander no spark or injector pulse

i dont think an 89 would have an inertia switch i know ive never seen any on my truck and its a 90
__________________
1990 Ranger Extended Cab
2.9L V6 5 Speed Transmission
Planning to put a 347 and a T-5 in it eventually

Quote:
Originally Posted by FireRanger View Post
It looks like someone attacked the front of the truck with a bedazzler.
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  #5  
Old 04-23-2011, 07:10 AM
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Join Date: Feb 2010
Posts: 6,042
Default Re: 89 rander no spark or injector pulse

every ranger ive owned has had one (86, 93,96, 01) so i dont know why his 89 wouldnt have one.
__________________
2001 Ranger 4x4 Stepside
-RCD Suspension lift
-33x12.5 BFG KM2's on Mickey Thomson classic locks
-4:56 gears
-Auburn gear LS
-James Duff traction bars
-Headers
-Flowmaster duals
-SCT X-Cal2 and some small exterior mods

http://www.cardomain.com/ride/2321189

2005 F-150 Lariat 4x4
-LED third brake light
-Weathertech floor liners
-Edge tuner
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  #6  
Old 04-24-2011, 09:55 PM
Learning to use the forums
 
Join Date: Apr 2011
Posts: 4
Default Re: 89 rander no spark or injector pulse

I looked for an inertia switch and could not find it. Also didnt see anything in my owners manual about one. Im not sure if my ecu is getting power. is there anywhere i can find a wiring diagram for the ecu to check power and ground and what not?
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  #7  
Old 04-25-2011, 03:30 AM
Ford Motor Co
 
Join Date: Jan 2011
Posts: 168
Default Re: 89 rander no spark or injector pulse

Check for power going to the ECM
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  #8  
Old 04-25-2011, 03:14 PM
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Default Re: 89 rander no spark or injector pulse

Quote:
Originally Posted by ddunfee View Post
Check for power going to the ECM
just checked with a volt meter. 1 pin has constant power all the time, and there are about 10 pins that have power with the key on.
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  #9  
Old 04-26-2011, 03:16 AM
Ford Motor Co
 
Join Date: Jan 2011
Posts: 168
Default Re: 89 rander no spark or injector pulse

Boy this is a tough one, with power to ECM and no inertia switch you should have something happrning
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  #10  
Old 04-26-2011, 02:24 PM
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Default Re: 89 rander no spark or injector pulse

what about the ignition module? could it cause these problems?
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  #11  
Old 04-26-2011, 05:24 PM
Ford Motor Co
 
Join Date: Jan 2011
Posts: 168
Default Re: 89 rander no spark or injector pulse

You say you have no injector pulse or ignition I believe the ignition module has nothing to do with the injector but if the ECM doesn't know the engine is turning over it won't send out pulses. I am not sure where the crank sensor is at but it just might be that.
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