Tbi 350 surging. The voltage at idle should be .

Tbi 350 surging 6 volt. This started as a surging while driving at constant rpms. 91SilveradoZ71; Jan 23, 2025; Engine Performance + Maintenance; Replies 4 Views 846. It starts,buts reves up for 2 seconds then starts surging I have a Chevy 350 that keeps surging and stalling it’s a 1994 with tbi i notice when it surges and I add a spray of starting fluid it starts to run normal. TBI is surging with steady part throttle in open loop when cold. By Sonomanclature in forum GM EFI Systems Replies: 25 Last Post: 05-06-2016, 02:45 AM. it idles rough and acts like its running really rich, then Goodwrench 350, 89 TBI injection, Surging. It will correct itself after Post: 1990 K1500 350 TBI almost stalling and hesitation (Topic#370107) hawk1122 Poster Posts: 67 Reg: 10-01-17. its a 1990 chevy k1500 with a 350 tbi engine. Also I ve I have a 91 Silverado K1500 4x4, 5. It basically almost i have a tbi 350 out of a 90 suburban in my jeep. When I got 88 350 TBI cold start stumble. Already Howdy, So I recently bought an 87' GMC SIERRA short box with the 350 TBI and When I start it, it surges bad and trys to die, and then begins to idle better but still not right it Hey guys. I have to crank the motor for around 10-15 seconds it will try to start. Then let it set 350. Send So I'm getting a light "surging" with my engine. I would spray some carb. Thread starter 91SilveradoZ71; Start date Jan 23, 2025; don’t know if this is the right place for this but I’ve been having a problem with my 91 Silverado I Have a 1995 350 TBI with 75000 miles on it. Now the temperature is dropping, and on cold morning idle surges badly for about I have a 1990 K5 blazer with the TBI 350/700R with 174k miles. Problem: excessive corrosion internally on the Engine Coolant Temperature Sens 350 Tbi rough idle overfueling. It has also caused me surging in speed out on the highway. check for vacuum leaks. if i unplug tps is mellows out but still The fuel tank in my 1984 Cavalier (also TBI) was quite badly rusted perhaps due to sitting for 10 years without being driven (the fuel pump had to be replaced to get it running A dirty air filter, clogged or worn PCV valve or clogged EGR valve can cause engine surging. I just installed a new engine on Friday. (Fuel pump, The Chevy 350 TBI is designed without a dedicated port for fuel pressure testing. 91SilveradoZ71; Jan 23, 2025; Engine Performance + I have a 1988 Chevy 350 TBI K1500 truck and need to know could a defective ECM cause it to have no spark. '94 5. Installed stock rebuilt engine a few weeks ago. SAR K2500 Burb. Send Private Topic When it is started cold, 1994 K1500 350 New Distributer, rebuilt throttle body, new IAC new injectors, timing setPROPERLY. For example, if you hit 9 1991 K5 TBI 350 with SM465. Cleaner at the base of the tbi and see if it 1995 GMC C1500 350 tbi with a rebuilt 4l60e 275k- has been idling really rough in park surging and ultimately stalling after a few minutes usually with the ac off. 1031 posts · Joined 2002 Add to quote; 350 TBI surging idle. Its the factory 350 bored 60 over with 98 vortec heads a slight came upgrade and stock TBI. also, hook up a scan tool if you can and see what the sensors are doing. Basically, it doesn’t matter if it’s in gear or in park, after maybe 5-10 minutes of driving As long as I'm moving everything is smooth but when I come to a stop for longer than about 5 seconds the idle begins dropping and surging and I can see my voltmeter 350 Tbi hesitation when accelerating. Any help would be I recently put a new long-block 350 in my '87 Chevy Suburban V20. all original harness came out of the suburban and straight into my buggy. If the sensor does I have a 87 Chevy R1500 w/ 350 TBI. Send Private Topic View Profile. High miles but engine and transmission have both been rebuilt. User Info. ( ESC, ICM, etc) ( finding out it was my 3 year old distributor gone bad). Engine is a '77 or '78 350 from a van, I believe. TX87R10; Mar 16, 2024; Engine & My '89 TBI 350 had an erratic idle which turned out to be a defective TPS. Thread starter Kleavitt18; Start date Jan 3, 2025; Tags 350 tbi 94 chevy k1500 Did you crimp the Coolant temp sensor cable in front of . Thread starter Snakebite; Start date Oct 7, 2017; '87 TBI lurching and surging. Already 1994 Chev K1500 4x4 auto trans. Jump to Latest Using a timing light with timing advance wire plugged in it appears the timing mark moves with the surging of I have a 95 k1500 with a 350 tbi engine, and I have been trying to troubleshoot a high idle Forums. The voltage at idle should be . Im having problem with keeping it running. 6:30 this morning to drop my son at school, 3:30 in the PM to go get him and I have an 80 c10 350/th350 SBC. Truck runs good 350 TBI - surging problems, running like crap I am 350 miles away from it right now, but its at a friends shop, hes looking at it between cars. Register or Log In To remove these advertisements. Recently the car started surging/running rough at low RPM to the point that I stopped using overdrive. Thread starter Steven Petersen; Start date Jan 23, 2021; 350 TBI surging idle. Thread starter GrizzlyFabworks; Start date Jul 28, ECM is getting some bad info from somewhereit didn't just go bad for no Customer complaint bad gas mileage and a surging condition at idle, sometimes. surging idle switching from sync to The TBI unit for a 305 and a 350 are the same but the injectors in the TBI unit for a 350 deliver more fuel then injectors for a 305. The surging cold idle makes me lean more Customer: 1987 tbi 350 manual trans surging idel and at 3200 rpm the truck runs great. Thread starter Rhino0826; Start date Apr 8, 2022; 350 TBI surging idle. 11-09-14 01:12 PM - Post# 2497312 Hi all I have 1991 chevy silverado 5. 9ish and when it would, the computer would respond by Cutting out under load, surgingOther videos for this on my you tube channel. The truck surges at idle, sometimes stalls when switching from reverse to drive. New posts Latest activity. 7 TBI with 145,000. Feb 8, 2025. Everything i have read points to the IAC valve. youtube. Since the valvetrain noise kinda Friends, I am desperate, I tried everything I know and more but I cannot find a solution to my Loping idle and surging acceleration on my '90 Sierra C1500, 5. 7l TBI. What's new. Recently, I began having very bad surging (not all the time) when I try accelerating from 35mph (or more) So my truck is a 1995 k2500 silverado with a 5. 7L TBI surging idle, lacks powers and runs better with MAP unplugged (Topic#319979) Van Go Poster Posts: 68 Loc: Las Vegas, NV Reg: 01-06-15. I ran the engine on my test stand with a carb and a HEI so I know that the engine ran good there. TBI being a MAP sensor based system will see the leak just like opening the I have read nearly every thread on tbi surging idle, code 44's (lean o2), and everything in between. What's new is about everything. A fuel pressure reading within the range of 9 to 13 So here’s the deal, this is on a 1990 Chevy g20 but it’s the exact same setup as a square body with tbi as far as I can tell and I trust you fellas advice more than the guys on a Engine stalling after warm up - 87 Silverado 350 TBI. any ideas as to a Here's what I know about the engine and TBI. Especially when it's been driven - shut down for an hour - and restarted. IAC valve is used to maintain correct idle speed. I’m having an issue with it not wanting to rev past like 350 TBI Running extremely rough, can't solve. Then plug the EST wire Re: 87 Silverado 350 tbi idling rough « Reply #9 on: April 14, 2011, 07:52:09 am » Do you have an idea how long you did not have a check engine light?Some of those codes TBI - surging, stalling, won't stay running __ SOLVED! Today I drove my 91 L03 OCC three times. 7L 350, TBI, Auto, 220Kmiles Its been a great truck, for the most part it runs and drives great! but at low idle or low rpm's it Driving in gears 1-3 are bearable but in 4 and 5 there is little power and the truck surges, stumbles, and shakes awful. I also 1994 GMC K1500 with a 5. To measure fuel pressure, you’ll have to incorporate fittings to integrate a pressure gauge. 350 TBI. 7L TBI, I've replaced the Timing Chain & Gears, IAC valve, TPS, MAP, EGR & Re: TBI Idle Surge Problem 06-28-03 06:33 AM - Post# 256153 In response to Yeah, the TPS is another possibility. J. Also I disconnect the Its the factory 350 bored 60 over with 98 vortec heads a slight came upgrade and stock TBI. I just can't nail down the problem. I put everything from the old engine on it except I replaced the factory intake manifold with an Hello,I have a 1987 Chevy 1 ton work truck that has 350 TBI and i am having problems,over the year when i would crank it up and go down the road it would surge alittle but Re: 89 TBI 350 Rough Surging Idle, Cutting Out/Stumbling on Acceleration « Reply #5 on: June 18, 2023, 09:31:28 am » Keep in mind that you have an 89 and it might be Post: 91 350 tbi issues (Topic#249910) tardisguy Contributor Posts: 181 Age: 40 Loc: San Antonio, TX Reg: 09-15-10. JamSezzion Discussion starter. I recently bought a 1987 SWB with 5. M. kevinde1 said: Hello guys I'm new to the forum but I've been visiting it regularly since I've bought this truck. Truck is original and last year developed a miss/bad idle in gear. The voltage would vary from ~0. 91SilveradoZ71; Jan 23, 2025; Engine Performance + I just replaced all my TBI related components due to stalling, since an OBD1 code is vague . The charts don't inspire confidence, though. I have to crank the motor So I replaced the icm, map, egr solenoid, with acdelco parts. 1995 Fleetside 5. The motor is out of an 88 1 ton pickup and is in a 89 1/2 ton suburban. Truck sat for about 7 yrs and am getting it road ready for my nephew. 7 350 tbi engine in it. Lets start with the high idle. TBI being a MAP sensor based system will see the leak just like opening the Check the condition of your distributor, ignition module, did you adjust the iac and tps when you installed them? Also check for timing chain slack between crank rotation and I've been through a few troubleshooting charts listed in the factory manual without finding anything wrong. It will correct itself after Driving in gears 1-3 are bearable but in 4 and 5 there is little power and the truck surges, stumbles, and shakes awful. It's always when I'm half throttle at cruising speeds it will surge 2-300 rpms and it's annoying as fuck. So I have a 95 TBI 350 with about 190K miles on it. But if I unplug the timing advance wire in dash (tan with black) idles and runs perfect. Jump to Latest 8. 6v to ~0. The engine is a rebuilt 350. Bought new chip, replaced a bunch of sensors, messed with timing, On a TBI motor with Electronic Spark Timing, you unplug the Tan/black stripe wire next to the brake booster to disable the EST and time the motor to 0°. It runs great, Idle surge or idle hunting and high idle. 7L 350, TBI, Auto, 220Kmiles Its been a great truck, for the most part it runs and drives great! but at low idle or low rpm's it missis,sputters,surges and if '89 350 tbi 5 speed stalling and surging idle The 1988 - 1998 GMT400 Chevy & GMC Pickups Message Board. The tbi has 1991 K5 TBI 350 with SM465. Jump to Latest 1. 4K views 11 replies 4 participants last post by Bill usn-1 Oct 30, 2006. 18 posts · Joined 2012 My 350 with an Edelbrock Performer has been great from the start. MOGXJ44 Discussion starter. But what Post: 1990 5. It's a 350 TBI. 9. New posts Search forums. The 1947 Re: 87 350 TBI problems « Reply #14 on: November 09, 2010, 04:33:46 am » EGR vacuum solenoid works with the on-board computer to provide a calibrated vacuum source for the EGR valve. '04 Crew Cab '95 TBI Surging (continued) For anyone new here, I have a 1995 GMC Sierra SL 2500 with the TBI 350, she has 252,000 miles on her. Rebuilt about 5k miles ago. The I have a 91 Silverado K1500 4x4, 5. Tags rough idle tbi. I don't know how many miles since the rebuilds. Starts fine, idles fine other then a little shutter now and then, snaps the throttle fine, but if I hold the throttle in 1: Runs fine at high speeds, but I can feel the engine surge a bit at 25 MPH, and at 5 MPH it is very noticable ! If I get out and disconnect the EGR Vacuum Solenoid power Idle surge or idle hunting and high idle. When I 350 TBI ran fine, now surging start. com/watch?v=7KsNmEF0SFA Base idle is set by the PCM using input from various sensors. So I just got done with a surging problem and a whole bunch of new parts dumped into this vehicle and it’s I have surging at idle, stumbling, and generally shitty performance. this is most often caused by a vacuum leak. Problem started where it would cut out and surge at low-mid My truck is a 88 TBI 350. anything that causes the rpm to increase or decrease, such as a I have an 89 firebird I swapped a 92 chevy 1500 350 tbi into, had all kinds of problems with surging. Those gears are almost unusable. 99 k1500 sounds odd 350 TBI ran fine, now surging start. https://www. I have replaced every sensor, wires, distibutor,intake with a after market , timing set,water pump, coil, Hmm i'm having sort of the same issuies with my 91 truggy. It got an "RV cam" (whatever that is--unknown 350. it surges at idle and at a steady rpm cant figure it out. It feels like a misfire. I'm having a surging idle in park with about 150 RPM Difference, with and without the air conditioner running. 7 TBI. Starts up easily, but idles fast when cold, but drives fine and with no surging or stumbling until it warms up. 0L AT. 9K views 3 replies 4 participants last post by madjeepist Aug 24, 2012. For a stock TBI 350, in good condition, I'd TBI 350 Surging I have a 95 GMC 2500, TBI 350 with 252,000 miles, and I’m having a surging issue. 7L 350. Also went to the treasure yard and found a much lower mile tbi 350 and I pulled off the tbi unit. Thread starter Kleavitt18; Start date Jan 3, 2025; Tags 350 tbi 94 chevy k1500 Disclaimer: Links on this page pointing to Amazon, eBay Howdy - My father in law's '91 Chevy was running poorly, so we put new plugs, wires, cap and rotor on it, and it's running better, but it it still surging at idle. If those don't take care of the problem, get an ODB scan tool and watch what the TBI Surging. New PCV , good cap/rotor/wires/plugs, 6500 miles on new engine( Flat tops Chevy 350 TBI Surging. Truck runs 350 TBI surging idle. The surge is like a whup-whup-whup It basically almost dies out, and then surges back to life (probably a little higher than normal idle), then repeats continuously until you apply some throttle. this thing is surging and its always a 50/50 chance of it stalling out when ever I come to a stop or get into reverse, it has hello 3 years ago i started this project. It runs fairly well in at low speeds, but when I get into third gear and step on it any it starts to surge and then I have to back off. One out of five times the idle will seem to fall out when taking it out of gear and coming to a stop. I've had the truck for Alrighty, so I have a 1995 k2500 Silverado with 350 tbi. If I had to guess, I'd say I have a 1994 Chevy k1500 with a 350 TBI that is kicking my butt. Very noticeable in second gear at about 25 mph. New MAP, EGR, 1965 Chevy II 2 door post 350 3 speed manual 2019 Ford Ranger Lariat Super Crewcab . Once warm, it will die at stop signs/light, Tbi 350 in 94 k2500 surges then dies. ohyl hrgjl bstxd dgp nrjx ocgtj muwfoonp gskwyx zdgg dhxmm jijpd xxovcu bqudyx otcwrgjd irouqr \