Throttle response - is it normal??
Discussion
Hi to all you fellow S owners out there. I'm a new forum member and an owner of an S3 for two days! This is the first of several questions that I hope someone out there will be able to help me with.
I bought my car aware of a 'sloppy' throttle response that I thought was just a simple matter of adjustment - now I'm not so sure...
The car starts, idles, revs and generally goes as would be expected. Idle speed according to the tacho is a little high at ~1000rpm. Initial experience suggested a lot of throttle pedal movement before anything happens. Further investigation revealed the following (all measurements taken from the centre of the throttle pedal):
0-8mm - taking up slack in the cable (ie 8mm of pedal movement before the cams/levers at the business end of the throttle cable start moving)
8-19mm - nothing happens at first then the revs DROP slightly (you can hear it, but not see it on the tacho)
24mm - Revs start to rise
115mm - full throttle.
So - I have a car that needs about an inch of pedal movement before it goes, and a long pedal travel to get full throttle (not that I really need it...)
The first makes smooth starts and gear changes difficult, and the second makes full throttle uncomfortable to get without taking one's heel off the floor.
My questions are:
1. is this typical?
2. what can I do to improve matters?
Looking forward to some response to all you S-heads out there!!
I bought my car aware of a 'sloppy' throttle response that I thought was just a simple matter of adjustment - now I'm not so sure...
The car starts, idles, revs and generally goes as would be expected. Idle speed according to the tacho is a little high at ~1000rpm. Initial experience suggested a lot of throttle pedal movement before anything happens. Further investigation revealed the following (all measurements taken from the centre of the throttle pedal):
0-8mm - taking up slack in the cable (ie 8mm of pedal movement before the cams/levers at the business end of the throttle cable start moving)
8-19mm - nothing happens at first then the revs DROP slightly (you can hear it, but not see it on the tacho)
24mm - Revs start to rise
115mm - full throttle.
So - I have a car that needs about an inch of pedal movement before it goes, and a long pedal travel to get full throttle (not that I really need it...)
The first makes smooth starts and gear changes difficult, and the second makes full throttle uncomfortable to get without taking one's heel off the floor.
My questions are:
1. is this typical?
2. what can I do to improve matters?
Looking forward to some response to all you S-heads out there!!
Welcome Ragtop, try this extensive thread:
Throttle Linkage Improvement
Usually the advanced search option will prove to be handy for the majority of subjects.
Good Luck and enjoy!
Throttle Linkage Improvement
Usually the advanced search option will prove to be handy for the majority of subjects.
Good Luck and enjoy!
Having been at SCH and looked at the various engines on dislay i did note that the throttle plate on the S3 engine had a kinked plate ie with air flow meters and those above ie s3C had a straight plate. Not that this stops you from converting. some cable slack can be taken out using the plastic threaded connection as the cable connects to the engine. having replaced the throttle cable i need to do this to get the new cable set.
Regarding the drop in revs, think I noticed the same. Some Bosch Injection specialist told me that it had to with the type of airflow/mass meters used for this type of Ford engine and therefore was nothing to worry about. Furthermore, as soon as I made the car roadworthy and past import tests I started driving the thing.
Then I noticed that as soon as the engine is a bit warm the rev drop doesn't happen anymore. Don't know if yours also drops when the engine is warm?
Then I noticed that as soon as the engine is a bit warm the rev drop doesn't happen anymore. Don't know if yours also drops when the engine is warm?
Martijn said:
Regarding the drop in revs, think I noticed the same. Some Bosch Injection specialist told me that it had to with the type of airflow/mass meters used for this type of Ford engine and therefore was nothing to worry about. Furthermore, as soon as I made the car roadworthy and past import tests I started driving the thing.
Then I noticed that as soon as the engine is a bit warm the rev drop doesn't happen anymore. Don't know if yours also drops when the engine is warm?
...What he said about the fev drop, same here.Then I noticed that as soon as the engine is a bit warm the rev drop doesn't happen anymore. Don't know if yours also drops when the engine is warm?
Gassing Station | S Series | Top of Page | What's New | My Stuff