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Old 03-17-2005, 03:09   #1 (permalink)
'94 ED XR8 Sprint Manual
 
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confused ED Sprint - engie slow to respond to throttle off

Guys,
I recently picked me up a nice little '94 ED Sprint, Manual.
All is well and goes like the clappers.
I have one question as I have not driven a EFI windsor for some time. (or at least one with balls like this one)
When I am driving and take my foot off the go pedal to change gears the engine revs either stay for a moneht and then slowly die down or increase a fraction and then die down slowly...
Any ideas?

The car has criuse control, but the above issue is when the CC is off..
I am wondering if the throttle return spring is not up to it or if I have a sensor issue??
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Old 03-17-2005, 04:20   #2 (permalink)
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Re: ED Sprint - engie slow to respond to throttle off

What revs are we talking about? The engine shouldn't hold revs at say full throttle, but under light throttle it can maintain revs for a short time before slowly coming down, this is caused by the IAC bypassing the throttle body. If it is doing it even at hig revs then yeah I would check the TB return spring, at least that is easy to check.
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Old 03-17-2005, 04:29   #3 (permalink)
Two SC 61's = trouble
 
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Re: ED Sprint - engie slow to respond to throttle off

Clean IAC and reset idle....with IAC disconnected, check tps is under .95 volts then put IAC connector back on...Drive it for a while...It may take sometime to settle down....If its had new battery or gone flat lattley could cause this also...
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Old 03-17-2005, 04:47   #4 (permalink)
'94 ED XR8 Sprint Manual
 
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Re: ED Sprint - engie slow to respond to throttle off

Guys,
Thanks for the ideas.
The problem only hapens during normal (grnad pa driver) conditions / traffic.
Please fill me in on some of the above acronims...
IAC?
TPS?
What pi on the TPS do I need to check.?

It has not had a new battery recently (That I know of) purchased it last Monday from a provate owner...

Thanks..
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Old 03-17-2005, 04:57   #5 (permalink)
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Re: ED Sprint - engie slow to respond to throttle off

IAC is intake air control

TPS is throttle position senser
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Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp..
Passengers, myocardial infarction material..
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Old 03-17-2005, 05:15   #6 (permalink)
'94 ED XR8 Sprint Manual
 
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Re: ED Sprint - engie slow to respond to throttle off

Mate,
OK thanks.
I will have a look and see if I can find the IAC and TPS and do some cleaning etc and see how I go. Will keep you posted..
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Old 03-21-2005, 03:24   #7 (permalink)
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Re: ED Sprint - engie slow to respond to throttle off

IAC is Idle Air Control
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Old 03-22-2005, 02:15   #8 (permalink)
Two SC 61's = trouble
 
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Re: ED Sprint - engie slow to respond to throttle off

Quote:
Originally Posted by EATURBO
IAC is Idle Air Control
Yes correct....

Also check the purge relay behind the left head light..It's connected to the canister under guard..Has two wires going to it..And vacuum line to inlet follows fuel lines...
If its stuck open gas from canister could be entering intake then o2 sensers are reading rich mixture and eec is trying to lean out mixture by adding more air...It should show up on eec check if you can get it done somewhere...
Or just block it off, see if it makes any difference?...
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Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic!
.
Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp..
Passengers, myocardial infarction material..
R.I.P Possum...
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