302 EFI Problems!?
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Elder User
Joined: Dec 2006
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From: South Carolina
302 EFI Problems!?
ok so my truck is running like its rich, i think its the MAP sensor, so how would i go about checking that? also anything else (yes i know that it could be like 30 things) relavent to rough idle, crappy sound and no power?!
this thing is really starting to irritate me!
its lucky i bleed blue!
this thing is really starting to irritate me!
its lucky i bleed blue!
Moderator
Joined: Dec 2001
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From: Louisville,Ky.
Check and make sure that you have good vacuum to the map sensor at an idle. With little or no vacuum, it will run really rich.
Also, check the fuel pressure regulator. If there is gas in the vacuum line, it is bad.
Also, check the fuel pressure regulator. If there is gas in the vacuum line, it is bad.
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Elder User
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From: South Carolina
Umm
you wouldnt happen to have a diagram of what it looks like, i looked it up on google, but can really get a GOOD image of it, especially since I have to check it seeing how my dads out of town!
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
What makes you think it's the map sensor? Have you pulled the codes? Go here and find out how... http://www.fordfuelinjection.com/?p=13
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From: Louisville,Ky.
The fuel pressure regulator is round and silver and is on the fuel rail with a single vacuum line coming out of the top. The MAP sensor is black and a little longer than it is tall, maybe 2"x3" and has a vacuum line coming out of the bottom on it. It should be mounted on the firewall.
Elder User
Joined: Oct 2006
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From: Redmond, WA
Originally Posted by Plums72
ok so my truck is running like its rich, i think its the MAP sensor, so how would i go about checking that? also anything else (yes i know that it could be like 30 things) relavent to rough idle, crappy sound and no power?!
this thing is really starting to irritate me!
its lucky i bleed blue!
this thing is really starting to irritate me!
its lucky i bleed blue!
Pull the codes before you try to self diagnose your issue. Don't waste your time buying or testing sensors before you know what your EEC-IV diagnostics tells you.
Or keep on
Good Luck
Mike
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Elder User
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From: South Carolina
well the codes said it was a profile ignition sensor circuit malfuntion, and i have no idear what that means!
secondly i thought it might be the MAP because i have a book on Electronic systems for ford vehicles and what my truck is doing is almost exactly what it describes happens when a MAP sensor has failed
secondly i thought it might be the MAP because i have a book on Electronic systems for ford vehicles and what my truck is doing is almost exactly what it describes happens when a MAP sensor has failed
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From: Louisville,Ky.
I'm thinking that pertains to the pick-up coil in the dizzy, but I'm not 100% sure.
Usually when they start failing, the act real lean like running out of fuel, then die. The after they cool off, they run great for a bit then heat up and repeat the same process again.
Usually when they start failing, the act real lean like running out of fuel, then die. The after they cool off, they run great for a bit then heat up and repeat the same process again.
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From: Ottawa, Ontario
Originally Posted by Plums72
well the codes said it was a profile ignition sensor circuit malfuntion, and i have no idear what that means!
The ignition sensor circuit consists of 2 parts, the Hall Effect sensor inside the distributor that generates a pulse corresponding to cylinder TDC events, and the TFI module that interprets that and generates the PIP(Profile Ignition Pickup) signal and sends it to the computer. See here for a view of both... http://autorepair.about.com/library/images/bl389lib.htm
http://autorepair.about.com/library/illustrations/bl278a-lib.htm
You will have to dismantle the distributor to change the Hall Effect sensor, and it's not likely it has failed if the motor runs at all so start with the TFI module. You can test it as shown in the link, and replace it if it fails. Depending upon the year of your truck, the TFI is either on the side of the distributor or on the fender.
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Elder User
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From: South Carolina
possible explanation
ok so i went and checked it out, ok so theres this black cylinder, with wires and stuff going to it, and theres a wire coming from it that connects to a plastic piece which connects to some connectors (name?) and the plastic piece is broke! so what should i do?
Elder User
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From: Redmond, WA
Originally Posted by Plums72
ok so i went and checked it out, ok so theres this black cylinder, with wires and stuff going to it, and theres a wire coming from it that connects to a plastic piece which connects to some connectors (name?) and the plastic piece is broke! so what should i do?
