88 740 8v starting issue

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Old Nov 19, 2007 | 09:15 PM
  #1  
VolvoMonki's Avatar
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Default 88 740 8v starting issue

Ok new parts AMM, FPR, injectors, TPS, fuel pump relay
Ok I can get the car to start with starting fluid and holding the gas then let off gas and it idles up and down some times it will run like this for a minute or two and if i unplug the AMM the idle goes to 2500 and holds steady
I just read about the radio supression relay Ill have to look for that and I want to repalce the reference sensor but one isnt listed for an 88?
thanks for the help
 
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Old Nov 19, 2007 | 10:35 PM
  #2  
tripleb's Avatar
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Default RE: 88 740 8v starting issue

Have you tried to diagnose the problem by checking to see what is missing, e.g. spark, fuel pressure, injector pulse?

The reference sensor is in the distributor, if you have spark, it's probably OK, though they do fail. Check the connector to it, they are plastic and they break and cause the wires to short out.

The suppression relay powers the injectors. It is a black relay, it should be on or near the shock towers, there are 2, one is for the radiator fan. You can sway them and see if it helps.
 
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Old Nov 20, 2007 | 07:51 AM
  #3  
VolvoMonki's Avatar
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Default RE: 88 740 8v starting issue

I have spark and fuel to the injectors but no pulse
I see only one relay on the coolent jug
guess ill keep looking
 
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Old Nov 20, 2007 | 08:32 AM
  #4  
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Default RE: 88 740 8v starting issue

the distriutor also looks new w/ new wires / plugs
I swapped the to relays on the fuse box marked fan relay and injector relay nothing but it does click
 
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Old Nov 20, 2007 | 10:04 AM
  #5  
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Default RE: 88 740 8v starting issue

Ok I got it running
the relay on the coolent bottle w/ key on 12v on one side and 8v on the other (thick red and thick green w/red tracer)
So I jumped them and it starts
So this means my relay is eating 4v? needs to be repaced or I'm reading a voltage drop from something else?
 
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Old Nov 20, 2007 | 06:10 PM
  #6  
tripleb's Avatar
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Default RE: 88 740 8v starting issue

The voltage drop is from a bad solder joint in the relay probably.

The relays fail all the time, I would replace it.

By the way, great name!

B
 
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