missing as rpm's goes up.
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missing as rpm's goes up.
hello everyone,still trying to fix my truck,it has a miss as the rpm goes up and want to die when it idle.i've replaced the plugs,wires,roto-button.dist cap.icm,maf,os,cps,fuel filter,fuel pump,coil pick up,coil,.does any one have any other ideals what might be going on?it on a 1996 150,5.8l.4x4 auto
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I Have Replace The Tps,maf,still Missing At Idle,and When It Get To The Same Rpm Every Time. Iac Is Reading Right.fuel Pressure Is At 48.replaced The Fuel Fliter,fuel Pump.plugs,wires Coil Coil Pick Up.dist.dist Cap,roto Button,plugs.os,cps,icm.i Think That About Every Thing That I Can Remember Right Now,valves Are Good With Good Compresstion.all Wiring Check Good.does Any One Have Any Ideal That Can Help Me?
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From: Ashland City, TN
Only other thing I can think of is Timeing.
As for the IAC.
They can read right, and still not operate properly.
And the only other thing I didn't see mentioned was the FPR.
As for the IAC.
They can read right, and still not operate properly.
And the only other thing I didn't see mentioned was the FPR.
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From: Redmond, WA
You could have one bad plug, improperly gapped plug or a shabby wire. Did you route your wires properly? Numbers 1 and 3 and 5 and 6 must stay far away from eachother and should not run underneath eachother at the dizzy. Any one of the above issues will cause a misfire up the rpm band without throwing any codes. Follow the routing example below.
http://www.supermotors.net/vehicles/...media/470416_1
Turn the truck on late at night (dark as possible) and let it for 5-10 mins. Let it reach operating temperature and watch each cylinder for arcing as the rpm's go up. (Pull out the bulb underneath your hood).
If that doesn't work, I'd purchase some high quality suppression wires and NGK vcore plugs (you get what you pay for). Hit the contacts on the cap and rotor with a file to freshen it up. And try again.
I had a similar issue a few years back after a tune up. No codes and a bad miss around 2500 rpms. The plugs were gapped correctly and wires routed properly. But I had purchased a so-so brand of wires that came with 8 free autolites. I threw them in the garbage and picked up some quality wires and NGK plugs. Misfire disappeared.
Hope this helps,
Mike
http://www.supermotors.net/vehicles/...media/470416_1
Turn the truck on late at night (dark as possible) and let it for 5-10 mins. Let it reach operating temperature and watch each cylinder for arcing as the rpm's go up. (Pull out the bulb underneath your hood).
If that doesn't work, I'd purchase some high quality suppression wires and NGK vcore plugs (you get what you pay for). Hit the contacts on the cap and rotor with a file to freshen it up. And try again.
I had a similar issue a few years back after a tune up. No codes and a bad miss around 2500 rpms. The plugs were gapped correctly and wires routed properly. But I had purchased a so-so brand of wires that came with 8 free autolites. I threw them in the garbage and picked up some quality wires and NGK plugs. Misfire disappeared.
Hope this helps,
Mike
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what is the fpr?plugs has been check.the tech said the he get shock sometimes with his hand on the wires but not every time.he try the at night but dont see anything.at idle it start do die then surge and then it will die also.as for resetting the computer ,the cable was disconnected for about 30 mins.the tech said he was going to try one more thing and if that didnt do it he given up! what is the dizzy?
