94 firehawk bone stock. my hawk has a severe hesitation when running at full throttle. it sounds like it wants to run, but the rpm's climb really slow and the car starts bogging down. if i let off and go to 3/4 throttle, it runs fine. it is kind of hard to start in the morning and slightly hesitates when first taking off. it runs fine down the interstate and from about 1/2 to 3/4 throttle. sitting idle it does not miss and will rev to yellow line with no hesitation. i have also noticed if i've been driving and park the car for an hour and come back out to leave when i start the car it fires up fine, but when i first start driving, it wants to die and just sort of burbles and coughs. the only way i can keep it running is to feather the clutch and gas. after a couple of minutes it becomes driveable again, but still no wot response. i have changed the fuel filter, the ignition coil, and plugs and wires with no help, i currently have 85,000 miles and changed the opti for failure at 60,000. my car is not displaying any codes. any help would be great, i'm getting frustrated with this one.
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94 firehawk stock with slp exhaust. one more thing i forgot to add to this was one time i got a code for fuel lean monitor. i am at a total loss on this. the only other thing i can think of is a possible faulty fuel pump not putting out enough pressure to accelerate under load. it seems everyone on here always has really good tips and advice on troubleshooting. thanks. -
I would check the fuel pressure, if its ok it might be the opti again93 t/a A4 3.23s
95 Formula A4 2.73s >>>>93 t/a 3.23 , !AIR, !cat, !A/C, hotchkis lowering springs, kyb adj shocks, DD
99 Camaro z28 a4, 2.73, !AIR, !A/C
99 Alfa Romeo 166 3.0 v6, red
97 3.8 v6 A4 camaro, hardtop
93 Camaro Z28 M6, hotcam kit, 150 shot, twin plate clutch, eibach pro kit and bilstein shocks, swaybars etc
00 audi a6 4.2 40 valve v8Comment
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if its said that it was lean maybe there isnt enough fuel getting to the motor or... into the motor, especially at wot when it needs it the most.[COLOR=Navy]2000 Navy Blue Trans Am, T Tops, Automatic, Ram Air, Slp 85mm Mas, Air Lid, Smooth bellow, Hooker 1.75 Lt's, ORY, LM1, Air/EGR delete, Throttle body coolant bypass. Msd super conductor wires. TSP cam, ss3600, svo 38LB injectors.
Ported fast 92 mm intake and 92 mm TB on order.
11.539 @ 118.82 1.649 60 foot.
1969 z28 - 9.957 @ 133.92 1.425 60 foot.Comment
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If I may add. just from my experince, there could be build up in the fuel rail.
At 85,000 miles it seems unlikey, but every car is different.
Did you ever wash the engine or go through heavy amounts of rain?..because if you did, no matter if you have a new optispark or not-it will foul out on you.Comment
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no, i dont think the rain was an issue. i've had the car in the garage for the last six months. I think the next thing i'm going to try is a fuel pressure check under all conditions.Comment
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