hesitation

Please help! I have my dads 87 Mustang convertible that has been siting in my garage for several years. It broke my heart seeing it day after day not running. I finally had an opportunity to put some money into it. I did a five lug conversion, high performance shocks, plugs, wires, air...

So I have an '85 Mustang GT with a 302 automatic and 3:73 gears. I replaced the engine with a roller motor I purchased from Blueprint Engines. The dyno sheet that came with the engine showed 9:1 compression, 308 hp and 344 ft/lb torque (at the crank). I put a Holley 4160 600cfm with vacuum...

Hey everyone! First post here! I just got my 96GT back from up north, sitting around for about 7-8 years and no upkeep... Long story short, pops just left it covered outside in the DC weather... I'm starting to work on it again and am having a ton of issues as you can imagine. For starters, i'm...

So i have installed a Blueprint Engine with 9:1 compression that dyno'ed 308 hp / 344 ft lbs torque. I installed a dual plane aluminum intake, a 1/2 phenolic spacer, a new Holley 4160 with vacuum secondary's, and an HEI distributor. For the drive line i have an AOD with 2400 stall torque...

Well after hours and hours of following guides and videos and blah blah blah.. I finally found the issue of idle surge, hesitation under throttle, stumbling, bad mileage.. etc. Incorrect spark plug gap.. and since people are going to ask they were gaped at .035 not .055 and here is the reason...

Been working on this issue for months maybe even years now, it’s the same thing every test drive, it runs perfectly except for size varying hiccups and/or hesitations up at around 2k rpm, the code we’ve been receiving all this time has been code 212: loss of IDM (ignition diagnostic monitor)...

Hi guys! my 2004 mustang has gradually been running rougher n rougher. I bought it about 6 months ago and have always noticed a kind of hesitation as if something was blocked or clogged. Changed The air filter 1st thing. Rough idle kinda shaky. But a couple days ago it started sputtering and...

New to me Car. Somewhat of a Frankenstein engine. Donor car was a 1993 Fox Body GT. The engine was rebuilt and upgraded with: Edelbrock victor Cobra intake Fly cut pistons Compcams 1.7 roller rockers Compcams 1pc hardened pushrods 130 amp alternator King cobra clutch X-303 cam (286 degrees...

Well I don't really know if its the M.A.S. I will explain my problem now: When I accelerate the car start to hesitate like its low of fuel but only when its waiting at a red light, I guess that was the air filter so I change it for a new one, after I try the car without the air filter and works...

Hi everyone! This is my first post in this forum. I have been lurking and reading for a while and you have all helped me with my project. I was checking all my spark plugs the other day and on spark plug # 1 there was oil on the threads and build up on the electrode. I got worried and checked...

When I first bought this car back in May 2015 it died on the freeway and had a similar situation. Put a new fuel pump, pressure regulator, filter in and it fixed the problem. Ever since it's had a weird hesitation under throttle and has bucked and hesitated especially on hills in a higher gear...

Hi everyone, I have a problem in which I've searched the forums and can't find one like the problem I'm experiencing. I can't figure it out and need the Forum expertise! I have a 91 5.0 with this specific problem 100% of the time hot or cold engine. When cruising at normal speed, hesitation...

I have a 1994 Mustang GT that we traded a 98 f150 for. The car needed some work and had a surging idle and miss. The idle used to surge from 600 to 1000 and ran like sh*t. Since then we have cleaned and replaced the IAC valve, checked the plugs, plug wires, coil, and MAF. We then went to the...

Hello all, I am new to forums in general and I thought the perfect time to join one is when I purchased a classic mustang. Anyways the problem I'm having is whenever I hit the gas hard, the car hesitates for about 2-3 seconds then finally revs up and goes. Its pretty bothersome and annoying...

have a 99 by 4.6! First off when I start it it jumps to about 1500rpm then creeps down to 1000 and just hangs there. I put a new iac on and nothing. Second, while I'm driving around 40 mph my card starts vibrating I can feel it in the dash almost like its shuddering. If I floor it, I wants to go...

For those who care to take a guess at the issue or have seen this issue before!- As warmer weather nears, I'll be fiddling with the car to get more info. Here are the specs/ concerns: -88 original 5.0 car Paxton novi 1000 supercharged with FMU - (No chip in ECU) -Car is still speed density...

I have a 98 gt 4.6l. I have a momentary tick, hick up at any speed, What ever you want to call it.. There are no codes. Took it to a shop and he found no codes in the computer. He put it on all his testing equipment and found nothing. There is no pattern as to when it happens. It seems to maybe...

Hello, I have a 1989 Foxbody Mustang 5.0 and whenever I give the car full throttle the engine starts to die. It makes popping noises under the hood and if i keep my foot pushed down on the throttle all the way the rpm drops and it just makes popping noises. I replaced the fuel filter and have...

I just recently bought two fox bodies, the second one is what I am posting about. I will post in the introduction area for my background when I am done posting this. The car is an '89 GT Hatchback. It appears to be stock except for the following: 1.I was told it has a race clutch. It is...