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01-24-2009, 01:08 AM | #1 | |
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Wont start warm... help
Hey guys
This one stumps me. I have an 87 rx7 and when I bring it all the way up to temperature. I turn the motor off it will immediately start back up. When it sits for a couple of hours It will not start until it is completely cool Fuel pressure has been tested /volume/ pressure It is getting spark during the period that it does not start The spark plugs are not wet as though it is flooded Any suggestions |
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01-24-2009, 01:29 AM | #2 | |
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Re: Wont start warm... help
How is the fuel pressure/volume during no start ?
Is it a strong spark, bluish white, or a weak spark, orangish, during no start ? Just some thoughts |
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01-24-2009, 01:41 AM | #3 | |
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Re: Wont start warm... help
Pressure directly to pump 57 lbs
Circulating pressure 37 |
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01-24-2009, 04:34 PM | #4 | |
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Re: Wont start warm... help
Here are the fuel pressure readings with the fuel pump connector jumpered:
1986-1989 ( Except Turbo) 64-85.3 psi 1986-1989 w/Turbo 49.8-71.1 To verify fuel pressure is to low to fire injector you could spray starting fluid into the air intake during no start. |
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01-28-2009, 08:40 AM | #5 | ||
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Re: Wont start warm... help
Hmmm, do you have a stand alone or stock Ecu?
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08-26-2009, 01:22 PM | #6 | |
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Re: Wont start warm... help
You need to get it compression tested as not starting when its up to temp indicates low compression.
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05-06-2010, 10:43 PM | #7 | |
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Re: Wont start warm... help
The series 4 and 5 rx7s are notorious for this problem and I encountered it with my series 4. The problem is they have a cold start injector and a seperate hot start injector. The later will most likely need replacing or cleaning as they tend to flood the motor (like a carby engine flooding) the factory ecu injects too much on warm start flooding engine. Is your rx auto or manual because autos suffer from this allot more. Mine had problems with the shifter not selecting park or neutral so wouldnt start. This coupled with above problem is very fustrating. I solved it by converting to manual and having hot start injector removed by profesdional rotary mechanic. Good luck with getting it fixed I know how annoying it can be waiting for it to cool down especially when you sitting at a gas station!
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