golddigger

that was the issue thank you for the input

Good Morning, thank you all for chiming in I have the problem corrected now it was the new booster pushrod length I assumed it was correct out of the box NOPE I was able to pull the master away from the booster far enough make the adjustment without breaking the lines loose because a one man bleeding team is no fun, after a few tries i was able to get my pedal back Yaaaay I have the booster depth tool coming today and will be able to make the proper adjustment again thank you for all your assistance John

I already changed the booster and the master rear brakes are adjusted perfect slight drag it seems like the pedal ends traveling before the brakes can get full pressure there is no air in the lines John

WELL 2 weeks later a gallon of brake fluid new master new front calipers no air in front lines no air in rear lines no efffn brake pedal still only at the very end of the compression is there enough to get the truck to half @$$ stop come on man I have done hundreds of brake jobs this one is beating me up I tried the open the right front bleeder method could not get light to come on with the key on ( light does work circuit is good) what else this bleeding is bleeding me any help would be great thank you John

Looking for a working "Instrument Panel for a 88 Comanche with tach thank you John

they have alot of high grade products

called it a dirty b*@ch and kicked the tire

Thank you all for the input, I have followed this procedure. on steps 9, 10, 11 it never came to be for me I did bench bleed the MC as normally a person would let it drip then started bleeding 15 seconds between compressions till clear fluid perhaps the little piston never shuttled as called out in the FSM in the front valve, the brake indicator light is working as it should when park brake is applied. this is why i reached out. Ill need to find something softer to bang my head on it is starting to hurt now. John

hello there I am having problems bleeding brakes on my 88 MJ replaced front calipers and mc BLED 5 TIMES REAR TO FRONT STILL SOFT PEDAL TILL LAST BIT OF PEDAL any help would be welcome I have done brakes hundreds of times before, what am i missing John

no it is clear and tight

its ok thank you for your input

no spare new lug nuts today

they are in good shape new

no it is not I checked it all out already thanks

I have a rear clunk noise when hitting potholes or bumps in the road and it is driving me nutty trying to find it. the leaf spring and shackle bushings look to be in good shape, there is only 85k on the clock it is a 88 Comanche pioneer exhaust is tight shocks are tight spare tire removed no visible movement in the rear springs or shackles

thank you OHM what should i be seeing on a good circuit? John

I have a 88 4.0 which runs pretty good except when initial startup when it goes into open loop then idle will drop way down stumble back up then start to surge slightly any suggestions what i could be missing John

I have a new rebuilt 4.0 in California for you HO head fresh build

California does have its benefits no rust and that is about it

thank you Pizzaman

thank you for your reply Carter I did adjust it correctly my input /base voltage is 4.96 and I adjusted it accordingly strange thing last night happened, I was checking the sensor plugs and found that when the air temp sensor is unplugged it will stop the stumbling even while driving yet there is still a small surge at idle. I need to find the unicorn sensor for the air temperature. any help will be greatly appreciated thank you John

Ill get after it I am also looking for a air temp sensor

Good morning I ham beating my brains out chasing a problem the truck is a 4.0 82k miles automatic transmission. it will be slow to fire probably 4-5 revolutions. then it will fire. it will run decent until the truck goes into closed loop then it will have a slight surge when idling I can hear when it goen into closed loop as the rpms will drop down real low than it will go into surg mode. it also has a slight stumbling issue at the start of the throttle range maybe 20 percent in while under a load or under acceleration it seems to run fine just at cruzing speed about 45 mph, or in nuetral about the same thottle what i have replaced. Mullfer Cat (was plugged) 02 sensor TPS Fuel filterr spark plugs map sensor Crank position sensor mods firewall ground direct from battery cleaned paint assed no-ox