91 Fuel issue
Thread Starter
Instructor
Joined: Nov 2017
Posts: 174
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91 Fuel issue
I've been having problems keeping my car on. It'll start then die, sometimes it'll last a while on before dying. I've installed a new fuel pump, fuel filter, and plugs. I checked the fuel pressure regulator and it appeared normal. No tears or anything. So can I say I have an injector problem? Reason I say it's a fuel issue is because if I spray starting fluid it'll start then die.
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
I've been having problems keeping my car on. It'll start then die, sometimes it'll last a while on before dying. I've installed a new fuel pump, fuel filter, and plugs. I checked the fuel pressure regulator and it appeared normal. No tears or anything. So can I say I have an injector problem? Reason I say it's a fuel issue is because if I spray starting fluid it'll start then die.
Instructor
Joined: Dec 2014
Posts: 144
Likes: 9
I had a similar issue with my 91, if injectors and fuel system check out OK check your cats. If they are the original, one or all may be clogged and/or collapsed. That was issue with mine, both of the pre-cats were done. Mine would start and as soon as you touched throttle engine would die. Replaced the 3 with a single high flow cat and new mufflers and pipes, runs like a new one.
Team Owner
Joined: Jul 2004
Posts: 28,378
Likes: 3,261
From: Hartford WI
I've been having problems keeping my car on. It'll start then die, sometimes it'll last a while on before dying. I've installed a new fuel pump, fuel filter, and plugs. I checked the fuel pressure regulator and it appeared normal. No tears or anything. So can I say I have an injector problem? Reason I say it's a fuel issue is because if I spray starting fluid it'll start then die.
Thread Starter
Instructor
Joined: Nov 2017
Posts: 174
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Team Owner
Joined: Jul 2004
Posts: 28,378
Likes: 3,261
From: Hartford WI
https://fuelinjectorconnection.com/c...d-rail-o-rings
Change the regulator diaphragm while you are there and fuel filter.
Change the regulator diaphragm while you are there and fuel filter.
Thread Starter
Instructor
Joined: Nov 2017
Posts: 174
Likes: 1
https://fuelinjectorconnection.com/c...d-rail-o-rings
Change the regulator diaphragm while you are there and fuel filter.
Change the regulator diaphragm while you are there and fuel filter.
Driver side resistance
18.0
06.603.510.5
Passenger side
18.010.518.018.0
Passenger side
18.010.518.018.0
Team Owner
Joined: Jul 2004
Posts: 28,378
Likes: 3,261
From: Hartford WI
https://fuelinjectorconnection.com/c...and-spring-kit
I wouldn't want to have to go back in and pull everything out.
While you are there, get a new set of gaskets for the TB. Take the IAC and the IAC housing off, clean the passages. Don't forget the top plate. Put everything back with fresh gaskets.
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Thread Starter
Instructor
Joined: Nov 2017
Posts: 174
Likes: 1
You are taking the manifold off and the diaphragm is cheap. Might as well replace the old rubber since you are there already.
https://fuelinjectorconnection.com/c...and-spring-kit
I wouldn't want to have to go back in and pull everything out.
While you are there, get a new set of gaskets for the TB. Take the IAC and the IAC housing off, clean the passages. Don't forget the top plate. Put everything back with fresh gaskets.
https://fuelinjectorconnection.com/c...and-spring-kit
I wouldn't want to have to go back in and pull everything out.
While you are there, get a new set of gaskets for the TB. Take the IAC and the IAC housing off, clean the passages. Don't forget the top plate. Put everything back with fresh gaskets.
Team Owner
Joined: Jul 2004
Posts: 28,378
Likes: 3,261
From: Hartford WI
Might as well do the coolant bypass to make it neater and easier to remove next time
Team Owner
Joined: Jul 2004
Posts: 28,378
Likes: 3,261
From: Hartford WI
Look at the TB. Under it there is a coolant hose going in and out of the TB. It will get gunked up sooner or later and to properly clean it, the TB should be removed. That means another coolant spill. Might as well bypass the TB so that it can be easily removed. It takes a connector for the hoses.
Team Owner
Joined: Jul 2004
Posts: 28,378
Likes: 3,261
From: Hartford WI