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    High IdLE???

    Common problem is vac leak at the base of the throttle body but could also be vac leak from somewhere else,,,,is the motor all stock? Any aftermarket bs parts on there?
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    what gears should I run in my 3/4 ton lifted gmc?

    Im runnin 35's BFG AT KO, they actually measure at 34 inch diameter mounted. I heard someone else on here said there runnin same setup as me with th400 and they like the 4.10,s for DD.
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    what gears should I run in my 3/4 ton lifted gmc?

    I think that rpm chart is off 4lo.com,,,,its just a math chat based on gear ratio/tire size/and 1 to 1 top gear. It's about 200-250 rpm between 3.73 to 4.10 and 4.10 to 4.56 ratios,,, Was runnin 4.56's for about a year after I got my burban with th400 trans,,,I loved those gears,,it felt like...
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    what gears should I run in my 3/4 ton lifted gmc?

    The chart is slightly misleading,,,,, I wouldn't look at it,,,its probably accurate but its assuming you have a full lock up transmission,,,,if a T350 is like my T400 your gonna be several hundred rmps over the chart just because your tranny dosent lock up. Plus 35 inch tires rarely exactly...
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    1990 Suburban 2500 suspension .'s

    That's looks really good to me. Looks a little low in the rear though. If you measure the height from the front axle to the bottom of the orig bumpstop bracket on the bottom of the frame that will usually give you an idea of the lift, I was told stock is like 8-9 inches, mine measures 15 inch...
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    1990 Suburban 2500 suspension .'s

    Take it for a test drive!! Im running 35,s on a 6in lift block in rear on my 89 burban. It rides rough to say the least. You cant really compare it to an ifs truck. It does feel like your driving a real truck though with the front leaf springs. I am looking to respring mine with just a spring...
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    Hood wont open, broken cable??

    Got it open with the coat hanger,,,cable wasn't broken just slipped off the latch,,,thanks for the link I was looking for it but couldn't find it,,,
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    Hood wont open, broken cable??

    Thanks I already removed most of my grill,,,,don't want to break it cuz its a nice orig one,,,gonna try the coat hanger,,,,it should pull to the drivers side right????
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    Hood wont open, broken cable??

    Anyone know how to open the hood when the release cable is broken, disconnected??? I cant reach if from under the radiator, cant see how to reach the mechanism from under the hood from the front.
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    TBI code 43 44

    Ya bought it new, been runnin it for a couple of years, it ran ok but I didn't like how it wouldn't idle down low enough,,,,truck feels like it has a little more power on the low end with the stock tbi,,,, I think it would prob work better on a modified tbi motor if it was set up by someone who...
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    1988 bbc tbi power

    That thing is a monster! 454 and 4.10 gears,,,,should be able to haul anything you want with that,,,,,,
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    TBI code 43 44

    Yeehaw I cleared all the codes. I replaced the O2 sensor and everything went away. I think that holley tbi had fouled up my O2 sensor because as soon as I replaced it code 44,,,,GONE,,,,
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    Engine Still Misses After Replacing Ignition Parts

    My truck had an intake manifold leak when I bought it. Idle would surge up and down. A mechanic told me I had a bad intake manifold so I replaced it myself and the idle surge went away. Sometimes it would run a lot better when it warmed up because when it warmed up the intake gasket would seal...
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    Engine Still Misses After Replacing Ignition Parts

    Well for whenever you get back from school,,, If your idling at 1200 rpm,s,,,thats way too high,,,and if its idling up to 1800 rpms???? Is it surging,,,,??? Sounds like a big vacuum leak,,,if you hook it up to a vacuum gauge it will really help diagnose a vacuum leak,,,, My 89 V2500 TBI runs...
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    TBI code 43 44

    Thanks Chengny........:confused:
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    TBI code 43 44

    Well I put the stock dizzy back in. And I had my gm tbi rebuilt at a carb shop. So I put the stock rebuilt tbi back on. Runs pretty smooth right now. I have a delco pcv valve on order. I tried to order a dizzy from the gm dealer but they said that part has been discontinued. Anyway im happy with...
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    TBI code 43 44

    I don't think the vac gage is bad I think its the engine causing it because sometimes I can hear the PCV valve buzzing like same way the vac gage needle bounces. Thanks for the chart but I don't think any of those sypmtoms are whats going on with my truck. I read somewhere that if your getting...
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    TBI code 43 44

    It runs like crap with O2 sensor unplugged. Today I pulled the old tbi from the JY because it was dumpin gas through one injector. I noticed the holley has an adjustable tps. I buffed the bowls and the butterflys with aluminum wheel polish so they don't stick anymore. I put the holley back on...
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    TBI code 43 44

    Oh yeah and I already replaced the O2 sensor about a year ago,,,,its the old one wire one,,,
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    TBI code 43 44

    Need to smog my truck and I was getting a code 43 and 44. I was also running a Holley 670 tbi unit which is supposed to be a factory replacement smog legal part. Well the holley has been pissing me off cuz it wont idle down and I was tired of driving it that way,,,shifting it with high idle...
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    1977 gmc grande sierra k25 350 th350 np203. front drive train clunk !!!help!!!

    You don't need a new one you just have yours rebuilt. You might be able to replace the u joints yourself (rebuilding it yourself) but I think the u joints are pressed in,,,I've done rears before the ones held in with the clips and theyre easy,,and you also have that splined slip yoke in the...
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    1977 gmc grande sierra k25 350 th350 np203. front drive train clunk !!!help!!!

    Your truck is really old,,,older than mine,,,so you have to go through and just replace whatever worn parts you know are bad and go from there,,,,if you've got clunking it can be one part or a combination of worn parts,,,id start with rebuildin your driveshafts and go from there,,,my burb had a...
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    NP241 slip yoke binding

    Finally fixed it,,,, Picked up a t case, with the support bar, from another 89 suburban someone was parting out,,,,after pulling my old t case I noticed the tranny mount was destroyed,,, $14 part,,,replaced the tranny mount,,bolted up my replacement case,,installed the support bar,,,runs great...
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    NP241 slip yoke binding

    Ah hell that's right,,,,I knew there was a reason had to have pre 91,,,,wow so I've really been lookin for a one year only t case,,,,guess ill be lookin for a 208 case now or just get mine rebuilt,,,thanks for the help,,,,
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    NP241 slip yoke binding

    Lookin 4 241 t case replacement No cardan joint,,,stock driveshaft,,,, So im looking 4 a replacement t case,,,,I just found out np241 with mech speedo is 89 only,,,,does anyone know if later model 241 cases will swap with mine,,,,Its been really difficult finding one for an 89 burban,,,but I...

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