Hesitation from Idle to about 1500rpm
12-21-2009, 11:43 AM
#1
Thread Starter
Join Date: Nov 2009
Location: CO
Posts: 6
Hesitation from Idle to about 1500rpm
So the range of issues start here...
1. It has a tough time starting. Sometimes it wont turn over and we have to take the key out, mash the gas to the floor, then it will turn over.
2. When at idle, it is moderatly rough. Not backfiring and it stays above 500rpm..just shakes (sounds like its cammed).
3. When leaving at idle, it is very hesitant. Like it has bad gas until it gets to about 1500rpm then it "unsticks" and starts to move like it should when i press the gas.
Sometimes even when moving and I want to pass someone, it "gargles" then becomes open again.
Im beginning to think it is a fuel problem or electrical where I am not firing on all cylinders.
Anyone have this issue before?
1998 GT, under-drive pullies, Magnaflow long tube headers, no cat converts or mufflers, straight pipe with off-road H-pipe, 3.73 gears, short shifter, Stage 2 Dual Friction clutch, PI intake manifold swap, sub-frame connectors, 1-1/2 inch drop, Eibach springs and struts.
1. It has a tough time starting. Sometimes it wont turn over and we have to take the key out, mash the gas to the floor, then it will turn over.
2. When at idle, it is moderatly rough. Not backfiring and it stays above 500rpm..just shakes (sounds like its cammed).
3. When leaving at idle, it is very hesitant. Like it has bad gas until it gets to about 1500rpm then it "unsticks" and starts to move like it should when i press the gas.
Sometimes even when moving and I want to pass someone, it "gargles" then becomes open again.
Im beginning to think it is a fuel problem or electrical where I am not firing on all cylinders.
Anyone have this issue before?
1998 GT, under-drive pullies, Magnaflow long tube headers, no cat converts or mufflers, straight pipe with off-road H-pipe, 3.73 gears, short shifter, Stage 2 Dual Friction clutch, PI intake manifold swap, sub-frame connectors, 1-1/2 inch drop, Eibach springs and struts.
12-21-2009, 07:36 PM
#2
4th Gear Member
Join Date: Sep 2009
Location: Michigan
Posts: 1,830
could be your iac valve. sounds like some issues i was having, although not all of them. could be worht trying to clean ur iac valve with some carb cleaner to see if it helps. quick and cheap before u start replacing expensive parts. the iac is typically somewhere on the TB, not sure about 98's though....
12-22-2009, 05:30 PM
#5
Thread Starter
Join Date: Nov 2009
Location: CO
Posts: 6
could be your iac valve. sounds like some issues i was having, although not all of them. could be worht trying to clean ur iac valve with some carb cleaner to see if it helps. quick and cheap before u start replacing expensive parts. the iac is typically somewhere on the TB, not sure about 98's though....
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