FRST Being a Bitch, please help!
13-01-2004 | 12:34 PM
#1
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FRST Being a Bitch, please help!
Hey folks can anybody help me with this one?
FRST, OFAB, standard, just been put together after replacing the head gasket!
Car starts fine, idles, revs half way but when you give it full throttle the car gently cuts like its getting starved of air or fuel! If you keep your foot right down the car dies, if you let your foot back up half way it goes fine again!
Im thinking this is a ecu or map or o2 adj or tps problem!!!!!
What I know so far is this - Fuel pressure is fine, compression is fine, spark is fine, all electrical readings seem fine, battery is fine, when tps is disconnected it wont even start, ecu is getting live.
Two concerning issues:
Fuel pump feed from ecu reads +4 volts all the time, even when the car is running!
I put new spark plugs in ran it on half throttle for a couple of minutes, checked spark plugs - fine! I then put the spark plugs in and ran it for a minute on half throttle and tried flooring it, it did its usual, i did this twice then switched it off. Took plugs out and they were black - overfueling!!!!!
PLEASE HELP, PLEASE!!!!
FRST, OFAB, standard, just been put together after replacing the head gasket!
Car starts fine, idles, revs half way but when you give it full throttle the car gently cuts like its getting starved of air or fuel! If you keep your foot right down the car dies, if you let your foot back up half way it goes fine again!
Im thinking this is a ecu or map or o2 adj or tps problem!!!!!
What I know so far is this - Fuel pressure is fine, compression is fine, spark is fine, all electrical readings seem fine, battery is fine, when tps is disconnected it wont even start, ecu is getting live.
Two concerning issues:
Fuel pump feed from ecu reads +4 volts all the time, even when the car is running!
I put new spark plugs in ran it on half throttle for a couple of minutes, checked spark plugs - fine! I then put the spark plugs in and ran it for a minute on half throttle and tried flooring it, it did its usual, i did this twice then switched it off. Took plugs out and they were black - overfueling!!!!!
PLEASE HELP, PLEASE!!!!
13-01-2004 | 12:44 PM
#2
Regular Contributor
Joined: Jun 2003
Posts: 213
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From: berkshire
From what you have described, it sounds similar to how my RST went when I put a new head on it. My Spark plugs were shot, just popped some new ones in & it was as good as gold.
Clean the plugs off & try driving it rather than giving it half throttle for a view minutes.
What plugs are you using?
Make sure the car is set to all the std timing marks or it won't run right.
Dan
Clean the plugs off & try driving it rather than giving it half throttle for a view minutes.
What plugs are you using?
Make sure the car is set to all the std timing marks or it won't run right.
Dan
13-01-2004 | 01:34 PM
#4
Virgin
Joined: Aug 2003
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From: hertfordshire
Fuel pump feed from ecu reads +4 volts all the time, even when the car is running!
PJay
13-01-2004 | 04:48 PM
#5
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Joined: Dec 2002
Posts: 142
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No Pjay the fuel pump is wired through a switch!
Im not using a relay but what I was meaning by the fuel pump feed reads +4v all the time is that if I was running a relay it looks like the fuel pump would be running all the time and hense the ecu is in limp home mode....
Dave.
Im not using a relay but what I was meaning by the fuel pump feed reads +4v all the time is that if I was running a relay it looks like the fuel pump would be running all the time and hense the ecu is in limp home mode....
Dave.
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